Probably not gonna get another update. The phone was released in Feb 2019, so more than 3 years ago – it had 2 Android updates and 3 years security updates, because that was the old policy. Even more, there was no beta rom for MIUI13, not even for China version and the EEA phones got the last update 7 months ago, as you mentioned. Releasing a MIUI13 update must be bug free from the start for MI9, but again, stable MIUI13 for other phones are 7 months old. We are days away from MIUI13.5 and is already announced that MI10 (+ others) is not going to receive the weekly beta roms from 18.07.2022, so MI10 is also getting sidetracked.