I, too, do not see an offer of an update to 10.0.1
I assume this is because I am using a Matrix nightly-20210809-beaa0c7, on a Raspberry Pi 3B of some sort, for which there is, as yet, no version 10?
It's actually working OK for my purposes (mostly local music, and Crackle & Shout TV video addons), so I will continue to practise gratitude and patience.