If someone will get access to my Coinomi wallet on Android 10 they can get access to my private keys? I mean if this someone have understanding of situation and get access full hardware access to my Android 10 smartphone storage.
If this person can unlock your phone and open your Coinomi app, he can just open the App and view the seed. This can be done at anytime using coinomi.
If you believe someone might have done something like that, you should straight away move your coins to a new Coinomi wallet, with a fresh new Seed.