well the default permission in core is * which has a permission group name 'Everything' so yes I would say it supports the wildcard for 'all sub.permissions of x permission'
it's just good practice to not use it unless needed because sometimes using the wildcard will also give you negative permissions... for example
permission.*
could include
permission.deny.*
which could be a permission used to deny access to a command or feature.
it's just good practice to not use it unless needed because sometimes using the wildcard will also give you negative permissions... for example
permission.*
could include
permission.deny.*
which could be a permission used to deny access to a command or feature.