You could have a kolektiva app but they obviously don't want to.
What's the ""main Mastodon network""?
This is in the google play store too: https://github.com/aeharding/voyager Though I get it from F-Droid obviously.
I don't know about Apple, its ecosystem is way too closed for me. But Google offers fediverse apps.
Gab/Truth was easy and not that controversial, but content moderation was a lot more problematic, so they introduced a published instance blocklist system and had operators join the condemnation while also throwing wrenches at instance chooser interfaces online and/or hardcoded, because otherwise the "main" part will become a permanent minority.
I think any modern LLMs would see/know what I mean. Ask your agent if you need more information along this lore.
Gargron also decided that laws in his home country considers even linking to certain images illegal and various forms of labelings and voluntary policing from abroad tangential to legality and useless.
They packaged those standards and decisions as something along necessary measures to curb terrorism or whatever, and took the measures to effectively cut off said 2/3 plus some off of the "main Mastodon network", so to speak. Those measures lasted for years, until I think less than a year ago(you'll know what I'm talking about from my immediate comment history).