I understand you're looking to filter community resources by relevancy.
I've noticed the same thing you did: if you search the community via "Templates and Tools" > Community tab, there are only two filters available. However, if you access the community directly at https://www.figma.com/community, you can filter your search results by creator and relevancy!
Thanks for letting us know about this – I'll pass your feedback on to our team. In the meantime, please consider using https://www.figma.com/community for filtering by relevancy.