Question about Xiaomi Wed 9

There are, but not too often. Last status was on Android 9.0 with Miui 10.2.something with 10.3 in sight.

However, there is a weekly beta channel where updates come weekly. Stability may be somewhat affected, but I haven't noticed anything yet.

Current status: Global Beta 9.6.27 (different numbering than Final, mind you). Security level 06.19 (so pretty up-to-date mMn).