[Other SmartWatches] rihokirss:
It give me idea to check what else can be set without watch UI. If somebody wants to try.

adb shell dumpsys | grep 'settings/'

settings/secure/long_press_timeout: pid=424 uid=1000 user=0 target=7dcde54
settings/secure/show_ime_with_hard_keyboard: pid=424 uid=1000 user=0 target=2dc071fd
settings/secure/show_ime_with_hard_keyboard: pid=424 uid=1000 user=0 target=459cef2
settings/secure/accessibility_display_inversion_enabled: pid=424 uid=1000 user=0 target=2dc071fd
settings/secure/accessibility_display_inversion_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/incall_power_button_behavior: pid=424 uid=1000 user=-1 target=3c538bc0
settings/secure/wake_gesture_enabled: pid=424 uid=1000 user=-1 target=3c538bc0
settings/secure/default_input_method: pid=424 uid=1000 user=-1 target=3c538bc0
settings/secure/default_input_method: pid=424 uid=1000 user=0 target=459cef2
settings/secure/immersive_mode_confirmations: pid=424 uid=1000 user=-1 target=3c538bc0
settings/secure/enabled_input_methods: pid=424 uid=1000 user=0 target=459cef2
settings/secure/selected_input_method_subtype: pid=424 uid=1000 user=0 target=459cef2
settings/secure/accessibility_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/touch_exploration_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/accessibility_display_magnification_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/enabled_accessibility_services: pid=424 uid=1000 user=-1 target=38770943
settings/secure/touch_exploration_granted_accessibility_services: pid=424 uid=1000 user=-1 target=38770943
settings/secure/accessibility_script_injection: pid=424 uid=1000 user=-1 target=38770943
settings/secure/accessibility_display_daltonizer_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/accessibility_display_daltonizer: pid=424 uid=1000 user=-1 target=38770943
settings/secure/high_text_contrast_enabled: pid=424 uid=1000 user=-1 target=38770943
settings/secure/enabled_notification_listeners: pid=424 uid=1000 user=0 target=3aa730f9
settings/secure/enabled_notification_listeners: pid=424 uid=1000 user=-1 target=3b1e83e
settings/secure/enabled_notification_listeners: pid=424 uid=1000 user=-1 target=2576f69f
settings/secure/pubkey_blacklist: pid=424 uid=1000 user=0 target=10c5a3ec
settings/secure/serial_blacklist: pid=424 uid=1000 user=0 target=10a0e3b5
settings/secure/enabled_print_services: pid=424 uid=1000 user=-1 target=2ce04a4a
settings/secure/user_setup_complete: pid=424 uid=1000 user=-1 target=315e5dbb
settings/secure/screensaver_enabled: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/secure/screensaver_activate_on_sleep: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/secure/screensaver_activate_on_dock: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/secure/sleep_timeout: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/secure/enabled_condition_providers: pid=424 uid=1000 user=-1 target=1e490631
settings/secure/voice_interaction_service: pid=424 uid=1000 user=0 target=1fe0c116
settings/secure/locationCoarseAccuracy: pid=424 uid=1000 user=0 target=3a8b1a97
settings/secure/locationPackagePrefixBlacklist: pid=424 uid=1000 user=-1 target=371e8484
settings/secure/location_providers_allowed: pid=424 uid=1000 user=-1 target=676d46d
settings/secure/measurement: pid=692 uid=10017 user=0 target=2e9fd8a2
settings/secure/measurement: pid=692 uid=10017 user=0 target=3d5cc933
settings/secure/prop.launcher.at_watchface: pid=692 uid=10017 user=0 target=364164f0
settings/secure/sport_total_distance: pid=692 uid=10017 user=0 target=8394a69
settings/secure/sport_today_distance: pid=692 uid=10017 user=0 target=2b46dcee
settings/system/time_12_24: pid=424 uid=1000 user=0 target=7dcde54
settings/system/end_button_behavior: pid=424 uid=1000 user=-1 target=3c538bc0
settings/system/accelerometer_rotation: pid=424 uid=1000 user=-1 target=3c538bc0
settings/system/user_rotation: pid=424 uid=1000 user=-1 target=3c538bc0
settings/system/screen_off_timeout: pid=424 uid=1000 user=-1 target=3c538bc0
settings/system/screen_off_timeout: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/system/pointer_location: pid=424 uid=1000 user=-1 target=3c538bc0
settings/system/pointer_speed: pid=424 uid=1000 user=-1 target=1290c58f
settings/system/show_touches: pid=424 uid=1000 user=-1 target=1f6fe01c
settings/system/mode_ringer_streams_affected: pid=424 uid=1000 user=0 target=2a932425
settings/system/vibrate_input_devices: pid=424 uid=1000 user=-1 target=f47d9fa
settings/system/screen_brightness: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/system/screen_brightness: pid=721 uid=1000 user=0 target=375e2bab
settings/system/screen_brightness_mode: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/system/screen_brightness_mode: pid=721 uid=1000 user=0 target=375e2bab
settings/system/screen_auto_brightness_adj: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/system/notification_light_pulse: pid=424 uid=1000 user=-1 target=35a8e208
settings/system/springboard_widget_order_in: pid=678 uid=10008 user=0 target=27f6dda1
settings/system/com.huami.watch.key.DEVICE_BOND_TYPE: pid=721 uid=1000 user=0 target=7299bc6
settings/system/EnableUnlockMIUI: pid=739 uid=1000 user=0 target=3b51d787
settings/system/light_changed_val: pid=678 uid=10008 user=0 target=2aee16b4
settings/system/key_music_open: pid=9938 uid=10015 user=0 target=397cfdb
settings/system/key_volumn_control_value: pid=9938 uid=10015 user=0 target=275a6a78
settings/system/sport_music_setting_source: pid=9938 uid=10015 user=0 target=1ec01551
settings/system/rise_hand_without_bl: pid=721 uid=1000 user=0 target=2dafea20
settings/global: pid=424 uid=1000 user=0 target=1fc9fd9
settings/global/debug_view_attributes: pid=424 uid=1000 user=0 target=7dcde54
settings/global/policy_control: pid=424 uid=1000 user=-1 target=3c538bc0
settings/global/wifi_suspend_optimizations_enabled: pid=424 uid=1000 user=0 target=c1a5d9e
settings/global/wifi_networks_available_notification_on: pid=424 uid=1000 user=0 target=35f4307f
settings/global/stay_on_while_plugged_in: pid=424 uid=1000 user=0 target=20f9884c
settings/global/stay_on_while_plugged_in: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/global/wifi_idle_ms: pid=424 uid=1000 user=0 target=88e6095
settings/global/wifi_sleep_policy: pid=424 uid=1000 user=0 target=e4ab5aa
settings/global/http_proxy: pid=424 uid=1000 user=0 target=4a5559b
settings/global/nsd_on: pid=424 uid=1000 user=0 target=2b5cdd38
settings/global/zen_mode: pid=424 uid=1000 user=0 target=13417111
settings/global/dock_audio_media_enabled: pid=424 uid=1000 user=0 target=2a932425
settings/global/adb_enabled: pid=424 uid=1000 user=0 target=27768276
settings/global/sampling_profiler_ms: pid=424 uid=1000 user=0 target=679b077
settings/global/wifi_scan_always_enabled: pid=424 uid=1000 user=0 target=89e94e4
settings/global/wifi_watchdog_poor_network_test_enabled: pid=424 uid=1000 user=0 target=93b0d4d
settings/global/wifi_watchdog_on: pid=424 uid=1000 user=0 target=2c05002
settings/global/device_provisioned: pid=424 uid=1000 user=0 target=27cedd13
settings/global/low_power: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/global/low_power_trigger_level: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/global/low_power_trigger_level: pid=424 uid=1000 user=-1 target=a221b50
settings/global/low_power_trigger_level: pid=616 uid=10007 user=-1 target=24b83149
settings/global/theater_mode_on: pid=424 uid=1000 user=-1 target=3f5f12d8
settings/global/overlay_display_devices: pid=424 uid=1000 user=0 target=28e76a4e
settings/global/auto_time: pid=424 uid=1000 user=0 target=3340376f
settings/global/last_charging_time: pid=678 uid=10008 user=0 target=32159c7c
settings/global/airplane_mode_on: pid=9953 uid=10011 user=0 target=2bedf1b6
settings/bookmarks: pid=424 uid=1000 user=0 target=1d53dd5a

Also you can see already set values with commands like:

adb shell content query --uri contetn://settings/system --projection name:value
adb shell content query --uri contetn://settings/global --projection name:value
adb shell content query --uri contetn://settings/secure --projection name:value