yaap:
https://mirror.codebucket.de/yaap/hotdogb/YAAP-11-Rocinante-hotdogb-20211005-img.zip
-reboot to bootloader, you can do this by pressing both volume keys + power button at the same time for some time/some seconds.
-open cmd in your fastboot/adb folder
-fastboot update --skip-reboot --skip-secondary YAAP-11-Rocinante-hotdogb-20211005-img.zip
-reboot to recovery. You can do this by pressing the volume keys at the bootloader screen, just press any volume key and when Recovery Mode comes on bootloader screen press power button.
-Now in the recovery, select factory reset and do a factory reset.
-Now, Click on reboot system now.
twrp, magisk:
https://androidfilehost.com/?fid=14943124697586374549
https://magiskmanager.com/go/download
-rename Magisk-v23.0.apk to Magisk-v23.0.zip and copy to phone
-boot to bootloader
-fastboot boot twrp-3-5-1_11-hotdog-20210728-fbev2-test.img
-Click on Install, Select Magisk-v23.0.zip and Flash magisk.
-Reboot