As I've done since 2020, my Teams and Fixtures blog for next season is up and running. So far it lists all known team squads for:
All 3 Polish divisions
Swedish Bauhaus Ligan
Danish SpeedwayLigaen
Additionally, all SGP, SEC, qualifiers, National Finals etc are also listed.
Once the various leagues' fixtures are published, I'll also add these via the links on the right hand side, and hopefully it can help you if you have any planning for meetings over the upcoming summer across Continental Europe...
https://speedwayteams2027.blogspot.com/