I have a feeling we’re gonna have to agree to disagree on what 2 writing credits is. It doesn’t mean you have 2 full-fledged products under your belt, it means your name can be found on 2 products in enough of a capacity that you earned a credit. Mid level, to me, would imply you have around 5 years experience in your field. Senior at least a decade.
And I am also going to ask you to explain how you figure WotC has released more material through the OGL/CC. Last time I checked, the Foundry team was only able to release an extremely bare bones 5e ruleset module based on the 2014 Basic Rules while the PF2e Foundry module has ALL of the PF2e rules. There’s a few other products fans have created (AoN, PF2easy) based on freely released rules.