I would expect a security update at the beginning of March (every 3 months) and as to when Android 10, it is currently scheduled for April..
Galaxy S21 Ultra 512g(VZW), Galaxy Book (original, VZW), Tab S4, Galaxy Watch3 (VZW)
I gave up on trying to find out what was going on with the USA wifi model of Tab S6. I will be placing it up for sale and using that money us some more to get the IPAD Pro. Sick of Samsung