Trying to add Meross M605 matter sensor

Configuration
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Trying to add a Meross M605 presence sensor.
Tried both adding it to MerossApp/Google beforehand, and removing from them and adding directly to Home Assistant, and just keep getting “something went wrong”, after finding it and starting to setup.
Sets up OK in both the Meross app, and google.
If I setup first in google, and try linking the app, I only get an option of linking with Grid Connect, Brilliant Smart, Home, and Tuya, and no options for codes, or whatever…
Thanks.

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This is the screen I get in Google Home when trying to add the MS605 to HomeAssistant ie there IS NO home assistant??
How can I get Home Assistant to show up here? (These are the other Smart apps on my phone - Pixel8)
Thanks.

Matter
Matter1080×2400 88.3 KB

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And as per the usual tech issues - can’t be trusted…
Had done a reboot previously, which did not fix the issue, but today, did another, and… now works perfectly…
Ah well…