Extending WAF support to Cloudflare pages and workers

I was looking over Cloudflare’s WAF settings. I’ve set up some rules. But unfortunately, since the rules are tied to a domain, the rules do not apply to Pages and Workers. Is there any option for this? Or will this support be added in future?

Requirement: Extend Cloudflare WAF to Cloudflare Pages and Workers based on the DNS entries.
For example. If abc[.]com has some WAF rules and example[.]abc[.]com has a CNAME record pointing to xyz[.]pages[.]dev. Then rules applied to *.abc[.]com should apply to xyz[.]pages[.]dev