Hello, my Samsung Galaxy tab s8+ encountered the same issue as you. When I entered *#2663#, the following situation occurred:
FW Version of WACOM IC: Not Supported
FW Version in Kernel Image: Not Supported
Tuning Version of WACOM IC: Not Supported
And then my spen couldn't connect to the tablet either，Have you resolved the issue with your tablet now? If so, could you please provide me with some help? Thank you very much!