Hey there and welcome to the Samsung UK and EU Community Customer to Customer Forum
I too have the A6 2016 tablet which I bought from Vodafone in 2016. At the time it came with 2 x OS updates and 3 years security patch updates (in the last year these were quarterly). Sadly support ended in 2019 and there is no chance of further updates for this device.
I would advise against using the device for any sensitive tasks such as banking apps, payments where you input card or bank details and for me I wouldn't even access a website where I have to enter a password (but that's just me, super security conscious).
Would be fine for watching YouTube etc or for the kids to play games on perhaps.
S24 Ultra