[Xiaomi Mi A2 Lite Guides, News, & Discussion] Niktendo:
Disclaimer

I am not responsible for bricked devices or anything like that. YOU are choosing to make these modifications, and if you point your finger at me for messing up your device, I will laugh at you.

Here are the current fastboot links for the Xiaomi Mi A2 Lite (daisy):

Fastboot Images:

Android 10.0 [V11.0.9.0.QDLMIXM]:

https://bigota.d.miui.com/V11.0.9.0....QDLMIXM_20200805.0000.00_10.0_e1ea175e5b.tgz

Android 10.0 [V11.0.7.0.QDLMIXM]:

https://bigota.d.miui.com/V11.0.7.0....QDLMIXM_20200617.0000.00_10.0_7d0ffb82ac.tgz

Android 10.0 [V11.0.5.0.QDLMIXM]:

https://bigota.d.miui.com/V11.0.5.0....QDLMIXM_20200518.0000.00_10.0_64aa05498c.tgz

Android 10.0 [V11.0.4.0.QDLMIXM]:

https://bigota.d.miui.com/V11.0.4.0....QDLMIXM_20200404.0000.00_10.0_88297a8e92.tgz

Android 9.0 [V10.0.20.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.20....0.PDLMIXM_20200327.0000.00_9.0_2baf524aaf.tgz

Android 9.0 [V10.0.18.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.18....0.PDLMIXM_20200109.0000.00_9.0_a7b709656c.tgz

Android 9.0 [V10.0.17.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.17....0.PDLMIXM_20191209.0000.00_9.0_8a03587b9f.tgz

Android 9.0 [V10.0.16.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.16....0.PDLMIXM_20191108.0000.00_9.0_8454506408.tgz

Android 9.0 [V10.0.13.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.13....0.PDLMIXM_20190813.0000.00_9.0_5d0d486f04.tgz

Android 9.0 [V10.0.12.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.12....0.PDLMIXM_20190717.0000.00_9.0_59368ef014.tgz

Android 9.0 [V10.0.10.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.10....0.PDLMIXM_20190613.0000.00_9.0_f1adc81d8e.tgz

Android 9.0 [V10.0.9.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.9.0...0.PDLMIXM_20190514.0000.00_9.0_f9d0c739e0.tgz

Android 9.0 [V10.0.7.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.7.0...0.PDLMIXM_20190318.0000.00_9.0_442d4f503e.tgz

Android 9.0 [V10.0.3.0.PDLMIXM]:

https://bigota.d.miui.com/V10.0.3.0...0.PDLMIXM_20190114.0000.00_9.0_e8d8d4a6d0.tgz

Android 9.0 [V10.0.2.0.PDLMIFJ]:

https://bigota.d.miui.com/V10.0.2.0...0.PDLMIFJ_20181221.0000.00_9.0_fed1fcdf5d.tgz

Android 8.1.0 [V9.6.11.0.ODLMIFF]:

https://bigota.d.miui.com/V9.6.11.0...0.ODLMIFF_20181112.0000.00_8.1_8028e3bf1c.tgz

Android 8.1.0 [V9.6.10.0.ODLMIFF]:

https://bigota.d.miui.com/V9.6.10.0...0.ODLMIFF_20181030.0000.00_8.1_141b42a73d.tgz

Android 8.1.0 [V9.6.9.0.ODLMIFF]:

https://bigota.d.miui.com/V9.6.9.0....0.ODLMIFF_20181010.0000.00_8.1_baf840279a.tgz

Android 8.1.0 [V9.6.6.0.ODLMIFF]:

https://bigota.d.miui.com/V9.6.6.0....0.ODLMIFF_20180816.0000.00_8.1_c1d890dd75.tgz

Android 8.1.0 [V9.6.4.0.ODLMIFF]:

https://bigota.d.miui.com/V9.6.4.0....0.ODLMIFF_20180724.0000.00_8.1_4afd3431a2.tgz

Use

fastboot flashing unlock

to unlock the bootloader.

You may also need to unlock the critical partitions by typing:

fastboot flashing unlock_critical

You can flash factory images using the batchfile in the firmware archive or using MiFlash. You can also flash in Snapdragon EDL-(Emergency Download) Mode (bootloader unlocked is necessary) by typing:

fastboot oem edl

(Instructions about flashing and download links can be found here [PC only!]) https://c.mi.com/oc/miuidownload/detail?guide=2