If you disabled Cloudflare and the site is still not accessible, then the issue is occurring outside of Cloudflare.
If this issue is only occurring when Cloudflare is enabled most likely certain ISPs are blocking Cloudflare IPs. Some countries, including Pakistan, have been known to block parts of Cloudflare IP ranges either due to government censorship, regulatory policy, or past abuse from other sites sharing those same IPs.
This means if those IPs are blocked in Pakistan, there is nothing Cloudflare can do to bypass that, as the block is happening at the ISP or national level, not on Cloudflare’s side.