I suppose it's possible, but, IIRCC I don't remember Raxxla itself ever being linked to the Thargoids themselves either for or against. Someone with better knowledge feel free to correct me, of course.
Well keep in mind this is all based on the idea.... The theory... That Raxxla is associated with the Guardians in some way. Maybe not their homeworld, but associated with them...
I read a theory once that suggested the Guardians used the technology they found on Raxxla, to escape to another Galaxy after they list their war against the Thargoids.
Therefore, knowing their old enemy could return through Raxxla, could it not then be theorized that the Thargoids would be watching it?
Couldn't they have even been present, to witness the Guardians departure?
Maybe Raxxla holds the key for us being able to finally make contact with the Guardians? Convince them to return... "Hey you couldn't beat them by yourselves, but what if you came back and we work together this time?"