rDNS / PTR Record Question

my domain is example.com with ip 1.2.3.4

hostname : host.example.com
mx record : mail.example.com
domain name : example.com

I have set the rdns/ptr record. and it's working.
I am pretty sure I set them correctly because I can achieve 10/10 email score.

The thing is, I want to use cloudflare in my main domain (example.com). If I enable cloudflare on example.com it will break the rdns/ptr record.

Is it okay for me to set rdns / ptr record to host.example.com instead of example.com ?

Yep, this is how mine is set up. I use CloudFlare too 

Thanks, it works great.

Thanks, it works great.

Need some help wth same problem, im using google cloud platform but cant find a solution, can you guys help me?

Thanks, it works great.

Need some help wth same problem, im using google cloud platform but cant find a solution, can you guys help me?

Google Cloud doesnt support PTR

Sure?
https://prnt.sc/gcl5er

Thanks, it works great.

im using cloudflare too

Sure?
https://prnt.sc/gcl5er

Yes I am sure.