Flutter #null-safety plugin, these plugins do not have null safety versions. What Should i do?

Question

null-safety compatible versions do not exist for:

• grouped_buttons
• apple_sign_in
• progress_dialog
• flutter_icons
• debug_mode

I am using these plugins for my project and came to know that these plugins have been discontinued and hence do not have a null safety compatible version. Where to find the alternate plugins if i have a discontinued plugin

I was upgrading my dependencies of my pubspec.yaml file to null safety versions, and came across these plugins