Activation flow of a plugin in a multisite environment

I'm learning plugin development and I came across this issue where I need to activate my custom plugin and from my research on this topic there are three possible scenarios:

1. Network admin activates the plugin for the whole network
2. Network admin or site admin activate the plugin for a specific site
3. Regular single site installation activation flow When I activate the plugin as a network admin the plugin is activated only for the site with $blog_id = 1. other sites mark the activate state as activated but the plugins' settings tab isn't showing in settings. How and where can I start debugging this issue?