If you cannot wait for the OTA, you can download MIUI 9.6.22.0 OEJMIFD update file and install it manually on POCO F1. In the meantime, check for the new update by going to Settings > About Phone > System updates > Check for update. Below is what is new in this update, download link and installation instruction.
What’s new in POCO F1 MIUI 9.6.22.0 update? If you would like to update your POCO F1 to latest version manually, then you can download and install the MIUI 9.6.22.0.OEJMIFD update manually. Prerequisites: – Ensure at least 50% battery charge remaining on the phone – Backup all contents you have on the phone (if you prefer fastboot method) – Download 9.6.22.0.OEJMIFD recovery ROM [here] – Download 9.6.22.0.OEJMIFD fastboot ROM [coming soon] Installation guide: After downloading the required firmware file, follow this detailed installation instruction. There are three methods to install software update on POCO F1. The first two methods (Updater app and stock Recovery methods) are very simple, but your device should be on the latest stable version of MIUI ROM. The third and last Fastboot method is bit complicated and required unlocked bootloader. However, the ROM version you are on is not important.