[Nothing Phone 1] Pho3nX:
Updated PA A1 to A2 :

1/ Step 1 > Bootloader (Fastboot)

c:\Android>fastboot update aospa-topaz-alpha-2-phone1-20221019-image.zip
--------------------------------------------
Bootloader Version...:
Baseband Version.....:
Serial Number........: 8xxxxxxx
--------------------------------------------
extracting android-info.txt (0 MB) to RAM...
Checking 'product' OKAY [ 0.002s]
Setting current slot to 'a' OKAY [ 0.007s]
extracting boot.img (96 MB) to disk... took 0.531s
archive does not contain 'boot.sig'
Sending 'boot_a' (98304 KB) OKAY [ 2.748s]
Writing 'boot_a' OKAY [ 0.167s]
extracting dtbo.img (24 MB) to disk... took 0.073s
archive does not contain 'dtbo.sig'
Sending 'dtbo' (24576 KB) OKAY [ 0.664s]
Writing 'dtbo' OKAY [ 0.038s]
archive does not contain 'dt.img'
archive does not contain 'pvmfw.img'
archive does not contain 'recovery.img'
extracting vbmeta.img (0 MB) to disk... took 0.001s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta' (8 KB) OKAY [ 0.001s]
Writing 'vbmeta' OKAY [ 0.001s]
extracting vbmeta_system.img (0 MB) to disk... took 0.001s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system' (4 KB) OKAY [ 0.001s]
Writing 'vbmeta_system' OKAY [ 0.001s]
archive does not contain 'vbmeta_vendor.img'
extracting vendor_boot.img (96 MB) to disk... took 0.237s
archive does not contain 'vendor_boot.sig'
Sending 'vendor_boot' (98304 KB) OKAY [ 2.657s]
Writing 'vendor_boot' OKAY [ 0.283s]
extracting super_empty.img (0 MB) to disk... took 0.001s
Rebooting into fastboot OKAY [ 0.001s]
< waiting for any device >
Sending 'super' (4 KB) OKAY [ 0.001s]
Updating super partition OKAY [ 0.019s]
Resizing 'odm_a' OKAY [ 0.004s]
Resizing 'product_a' OKAY [ 0.004s]
Resizing 'system_a' OKAY [ 0.005s]
Resizing 'system_ext_a' OKAY [ 0.004s]
Resizing 'system_b' OKAY [ 0.004s]
Resizing 'vendor_a' OKAY [ 0.004s]
Resizing 'vendor_b' OKAY [ 0.004s]
archive does not contain 'boot_other.img'
extracting odm.img (1 MB) to disk... took 0.015s
archive does not contain 'odm.sig'
Resizing 'odm_a' OKAY [ 0.005s]
Sending 'odm_a' (1568 KB) OKAY [ 0.046s]
Writing 'odm_a' OKAY [ 0.096s]
archive does not contain 'odm_dlkm.img'
extracting product.img (1786 MB) to disk... took 14.842s
Invalid sparse file format at header magic
archive does not contain 'product.sig'
Resizing 'product_a' OKAY [ 0.005s]
Sending sparse 'product_a' 1/7 (262116 KB) OKAY [ 7.673s]
Writing 'product_a' OKAY [ 0.454s]
Sending sparse 'product_a' 2/7 (262124 KB) OKAY [ 7.725s]
Writing 'product_a' OKAY [ 0.442s]
Sending sparse 'product_a' 3/7 (262124 KB) OKAY [ 7.709s]
Writing 'product_a' OKAY [ 0.444s]
Sending sparse 'product_a' 4/7 (262128 KB) OKAY [ 7.706s]
Writing 'product_a' OKAY [ 0.430s]
Sending sparse 'product_a' 5/7 (262116 KB) OKAY [ 7.723s]
Writing 'product_a' OKAY [ 0.449s]
Sending sparse 'product_a' 6/7 (262140 KB) OKAY [ 7.725s]
Writing 'product_a' OKAY [ 0.445s]
Sending sparse 'product_a' 7/7 (250948 KB) OKAY [ 7.405s]
Writing 'product_a' OKAY [ 0.448s]
extracting system.img (923 MB) to disk... took 8.025s
Invalid sparse file format at header magic
archive does not contain 'system.sig'
Resizing 'system_a' OKAY [ 0.005s]
Sending sparse 'system_a' 1/4 (262108 KB) OKAY [ 7.662s]
Writing 'system_a' OKAY [ 0.454s]
Sending sparse 'system_a' 2/4 (262120 KB) OKAY [ 7.721s]
Writing 'system_a' OKAY [ 0.459s]
Sending sparse 'system_a' 3/4 (262116 KB) OKAY [ 7.700s]
Writing 'system_a' OKAY [ 0.448s]
Sending sparse 'system_a' 4/4 (156524 KB) OKAY [ 4.622s]
Writing 'system_a' OKAY [ 0.359s]
extracting system_ext.img (565 MB) to disk... took 4.721s
Invalid sparse file format at header magic
archive does not contain 'system_ext.sig'
Resizing 'system_ext_a' OKAY [ 0.004s]
Sending sparse 'system_ext_a' 1/3 (262116 KB) OKAY [ 7.697s]
Writing 'system_ext_a' OKAY [ 0.446s]
Sending sparse 'system_ext_a' 2/3 (262140 KB) OKAY [ 7.559s]
Writing 'system_ext_a' OKAY [ 0.429s]
Sending sparse 'system_ext_a' 3/3 (53244 KB) OKAY [ 1.570s]
Writing 'system_ext_a' OKAY [ 0.223s]
archive does not contain 'system_other.img'
extracting vendor.img (857 MB) to disk... took 7.361s
Invalid sparse file format at header magic
archive does not contain 'vendor.sig'
Resizing 'vendor_a' OKAY [ 0.004s]
Sending sparse 'vendor_a' 1/4 (262100 KB) OKAY [ 7.707s]
Writing 'vendor_a' OKAY [ 0.461s]
Sending sparse 'vendor_a' 2/4 (262124 KB) OKAY [ 7.700s]
Writing 'vendor_a' OKAY [ 0.452s]
Sending sparse 'vendor_a' 3/4 (262140 KB) OKAY [ 7.702s]
Writing 'vendor_a' OKAY [ 0.449s]
Sending sparse 'vendor_a' 4/4 (88768 KB) OKAY [ 2.635s]
Writing 'vendor_a' OKAY [ 0.285s]
archive does not contain 'vendor_dlkm.img'
archive does not contain 'vendor_other.img'
Rebooting OKAY [ 0.000s]
Finished. Total time: 197.003s

2/ Step 2 > Update Magisk Boot Patched

c:\Android>fastboot boot magisk_patched-25205_96FMZ.img
Sending 'boot.img' (98304 KB) OKAY [ 2.721s]
Booting

3/ Step 3 > Boot Success

Apply Root after Boot Successfuly

Open Magisk :
Magisk > Install > Direct install (Recommanded) > "Let's Go"
"All done!" > Reboot

BUG : I use 2 SIM and now on Alpha 2 there only one Signal for the "prefered Data" SIM and not the other SIM