In theory you should be able to get it done by following this manual: https://wiki.mikrotik.com/wiki/Manual:I ... 29_tunnels
I can't say whether it really works as my ISP offers both IPv4 and IPv6 ...
Thanks man. I have shot them a mail, waiting for their responseIt is going to be technical no matter what.
Your easiest solution will likely be to get IPv6 on your internet connection first.
Find out why it is only IPv4. E.g. ask the ISP. Tell them it is 2021. Don't accept "nobody ever asks for IPv6" answers.