They already did and they had Worker AI for quite a while [0]. But I think it didn't catch up and they have there very old models.
Overall I think it's a good acquisition for both of them. Replicate would have to have more competitive pricing to compete with fal.ai
Is this the platform they are offering on Openrouter?
https://openrouter.ai/provider/cloudflare
not sure but that's quite possible. I haven't used cloudflare workers ai myself because they had quite limited number of models and choices so far.