But tgats stupid, since no manufacturer has parts available for that long.
And fairphone released an update for the FP2 after 8 years of being available. Thats crazy! I think it got out around the same time as the Samsung S3. Try finding a genuine battery for that thing.
And also the FP1 and FP2 were sold in really low quantities. The FP3 was the first proper product, which therefor has much better support and will have parts available for much longer