Has Pokémon GO changed their distance algorithm?
Update:
Niantic has reverted their plans again. According to their Twitter post the default distance is 80 meters from now on.
You were just used to the COVID-19 bonuses.
According to this article Niantic started to revert some of the changes made to take lockdowns and curfews into account. Since these are no longer a thing Niantic has decided to change some interaction ranges again in select countries (including the US).
The article also quotes a twitter post with the following image to visualize the changes:
