Relays running on CloudFare, check your Tor config. @sommerfeld did a few tests and it looks like CF is blocking everything that is not a Tor Browser by default. It is common to see the relay operational through a known Tor agent while at the same time sending 403s when clients try to connect.
nostr:nevent1qqsfuzpzrqkjgd4g8208we4npdcvvsy4s64p3gvmz2geyc0hzy9wjkspz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzpcx0k42f608hmd8zwdhcux7gfa3ys6hh5sfftkr8c633x3vsgffgqvzqqqqqqyzcjt5x