How would bridge posting work? Got an URL to some information on it?

When I click on the "share" button for a Nostr-native post, there are two buttons : repost and quote at the top of the box that pops up. (on top of all the user portraits) When I do this for a bridged (Mastodon-native) post, these boxes are gone. I can only choose "post to Nostr" below the user portraits, and this only allows a "quote" post rather than a repost.

That's strange, got a link to event that doesn't work? It's probably one or more specific events. I just reposted @Eugen Rochko without a problem, the same repost and quote buttons work fine for Blusky (using @Jay 🦋) and Threads (using @Barack Obama) as well. Though I think there is an ability to send replies back to those networks, right? I would love to add support for that as well.

OK on the first point, I realize that this might be a Mostr vs Momostr thing ... Those posts you reposted were from Mostr. I noticed that the Momostr posts also have a little globe ("proxy" tag?) icon at the bottom. Nostria seems to be recognizing them as a different thing. And yes, the point of the bridges is that they're supposed to relay information back to Mastodon... Although the functionality of this is very hit-and-miss, as I've documented, particularly with Mostr : View article →

example BTW nevent1qvzqqqqqqcpzpudtuh42mq0zzx2xht2aewvwje5fr9x9q0agrx2k42jymh9j3yytqqsv6m5qlu2atjzg4k75v8kzzeuqpwdz3qft6c7ltze426py0penszcrut39c

Another example, I reposted from Amethyst: nevent1qvzqqqqqqcpzptujz495l5qzjfqrzwr0wyenkzhajaq6qah4cuutcfsr5k6e6eclqy0hwumn8ghj7mn0wd68yttjv4kxz7fwv3jhyettwfhhxuewd4jj7qgawaehxw309ahx7um5wghxy6t5vdhkjmn9wgh8xmmrd9skctcpzpmhxue69uhkummnw3ezumt0d5hsz9thwden5te0dehhxarj9ehhsarj9ejx2a30qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgewaehxw309aex2mrp0yhx6mmddaehgu3wwp5ku6e0qyt8wumn8ghj7un9d3shjtnddaehgu3wwp6kytcpzamhxue69uhhyetvv9ujumn0wvh8xmmrd9skctcqypu2g8qzakn7vfdy5j2ptvjmz0tgph8gy0ululvd9slgfajyv7u0w9vswtx

I found the issue, the events from that bridge is marked "Protected Event (NIP-70) and Nostria didn't allow repost/quote of those. This is more of a relay NIP than client, it has been fixed now and deployed. Sorry for late fix, I had some other improvements to finish first. I also noticed that one of your comments in this thread renders as JSON, I'll get that fixed too tomorrow.