Even if the end of the deal is permanent we should still get at least one more MCU Spidey outing.
Sony's deal with Disney was for 6 Spider-Man appearances (I believe); Civil War, Homecoming, Infinity War, Endgame, Far From Home, and Spidey 3
Tom Holland's contract is with Dinsey not Sony (again I believe this is the case) which is also for 6 appearances.
So even with the Sony deal coming to an end Spider-Man 3 should be happening to honour the current contract. Which means we could hopefully get one more suit out of the MCU in Spider-Man 3.
What's up in the air is whether LEGO would be allowed to make any figures of the suits already in the Disney movies. For example, after the deal ends would LEGO be able to make a homemade suit from Homecoming? I'm not sure how the licensing would work with that. If the answer is no then we have to hope that they give us a Homemade and Bosco suit before this deal ends, they have plenty of time