Iris is merging with Snort, and I'm not sure which version is served now at iris.to and whether it is maintained. That might be the reason why your messages aren't visible on iris. Or it might be the relays problem.

Try snort.social, login there, go to profile, settings, relays - make sure you have a lot of relays, try adding some bigger ones like relay.damus.io, relay.nostr.band, nos.lol - use nostr.watch to find some.

Then try posting on Primal - they might not have full support of many relays right now because they use their own middleware, so I hope that if you setup relays in Snort then Primal would post there and it would be better visible outside of it.

I mostly use Snort on desktop, other good ones are coracle.social, nostrudel.ninja, satellite.earth