@Siim
when you say you can "read the news with my home network ip"
can you eleborate?
If you mean:
When i enable tailscale on my phone it gets an ip that is in the same range as my home network and i can visit news.bbc.co.uk
then that's not a very good test as tailscale supports split tunnelling meaning your phone could be connecting and getting an ip on your LAN range but then not routing anywhere and then your phone is using the mobile data connection to get to news.bbc.co.uk directly.
I really think you are better off posting on a tailscale forum or reddit group. I do not believe your issue is with the DWC server.
Or in other words, if you can reach the DWC from within your lan, it is working.