Xiaomi
Add a Print Service auf Xiaomi
Printing a PDF form or boarding pass directly from a Xiaomi phone only works if a matching print service is registered in MIUI. Without one, no printer icon shows up in the share sheet or print dialog of any app.
MIUI includes basic printing support in Settings, but only an installed driver makes a specific printer appear. Xiaomi phones commonly ship with a driver for Epson printers by default; devices from other brands need their own print service downloaded separately.
To add one, open Settings ➔ Connection & sharing ➔ Printing ➔ Add service. Pick the matching print service from the list and confirm with Install. MIUI adds the app to the Printing list and switches it on automatically.
Once installed, the printer still needs to be on the same Wi-Fi network or paired via Bluetooth, otherwise the service finds no device to send jobs to. If nothing shows up after installing, confirm the printer is powered on and connected to the same network before trying again.