i've got TWRP recovery which doesn't support OTA. This means I'm unable to OTA update my POCOPHONE F1. I found simple solution to my problem.
Here's how to instal OTA on F1 with custom recovery:
1. Download stock recovery from here.
2. Flash it with fastboot or TWRP > install image.
3. Reboot to sysyem.
4. Update phone.
Optionally (because you deleted TWRP and OTA removes root):
5. Flash again TWRP with fastboot.
6. Root again (e.g. by installing Magisk zip).
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