No crossplay or cross-progression between platform families.
Players on PC, PlayStation and Xbox do not share the same STO game world. Progress made on one version is not mirrored onto another.
No. PC, PlayStation and Xbox are separate game worlds. Characters, progress, purchases and other game data do not transfer between them.
Arc Games' support policy treats the PC, PlayStation and Xbox versions as separate worlds.
Players on PC, PlayStation and Xbox do not share the same STO game world. Progress made on one version is not mirrored onto another.
No. Linking a console account to Arc is not the same as transferring the game account or its data.
Those are same-console-family compatibility cases, not crossplay or a PC ↔ console account transfer.
Sony lists Star Trek Online as a PS4 Version that is playable on PS5. There is no separate native PS5 STO release to transfer into.
Source standard: Arc Games Support is used for transfer policy; PlayStation and Xbox first-party listings are used for current console-generation details.