I don't see the button to join a particular server.
MCPE-224234
Problem with Servers
Resolved
Duplicate
1
(Unassigned)
Unconfirmed
PlayStation
1.21.100.23 Preview, 1.21.100.22 Preview, 1.21.93 Hotfix
Retrieved
If you want to add and play on a non-featured server in bedrock, you can only do so on PC and mobile not on console. aka you can’t on PlayStation.