extensions on mobile are published as normal apps, so yes the process/requirements are the same as publishing any app on the app store

Safari on mobile iOS/iPad have supported extensions since iOS 15 (2021), it supported limited 3rd party content blockers since iOS 9 (2015)

it does have plugins, or “extensions” rather, and yes they are written in rust and compiled to webassembly. but currently there are still very few of them. although it’s a growing list

I’m a fellow Sublime user and recently got excited about trying Zed. it’s a good editor and fairly similar to Sublime, but lacked some language support and the plugins are still very few compared to other mature editors. also, it’s not quite as configurable as Sublime, for example choosing the LSP or linters. but it’s still in early development with frequent updates so I keep it installed and watch the releases

Who needs a list of features when we have more emojis than an iPhone keyboard update

so it makes JS code look better