If you use [SEO agency] your ads shouldn’t trigger on just “SEO” or other non-specific queries. There is always a chance it could as Google has relaxed matching quite a bit but unlikely.

I’d wait and scan your search queries reports, only block them if they are showing up there.

But fundamentally, yes you probably don’t want your ads showing for SEO which is way too broad, i.e. could simply be people wanting to learn about SEO.