'Because a lot of companies just aren't hiring waiting to see if AI can replace those jobs.'
Lots of companies do lots of things. Lots of companies hire AI experts etc. to see if there is any there there.
Lots of companies aren't hiring at all.
Lots of companies are hiring for lots of reasons.
Lots of companies are not hiring because they decided they have too many employees already, or are doing things that do not need to be done, or not doing them well enough, or should be doping something else more important, valuable, or with more potential.
The 'a lot of companies' is vagueness bordering on vacuous. You can do better, I hope.