We had the same issue hiring 8 years ago in the UK.

Since then I realized I’ll never require a react/vue/angular/ember/svelte/etc experience, just go for good JavaScript developers with frontend experience, framework doesn’t matter.

Took them a week or two to understand the Ember patterns that’s it.

I think we overcomplicate, all these frameworks are just slightly different ways how to build web apps, the core patterns are the same. Anyone experienced can pick any of these frameworks in matter of days or weeks.

Same on the backend, great if you’ve have experience with any of the express/hapi/koa/nest/fastify/hono, but if you don’t have experience with the one we use, it’s still fine. Hire good engineers, not good “framework” engineers.