Is there a report i can run that will show who has System Admin access?

To determine the system admins, you can run the following expression:

=load(
local!designerUsers: getdistinctusers(getgroupbyname("Designers")),
local!adminUsers: apply(fn!isusersystemadministrator,local!designerUsers),
index(local!designerUsers,where(local!adminUsers),{})
)

The default Designers group contains all system admins by rule, but non-admin users can be added to the group so the second step is needed.

You can use this expression as the basis for the desired report.

To determine the system admins, you can run the following expression:

=load(
local!designerUsers: getdistinctusers(getgroupbyname("Designers")),
local!adminUsers: apply(fn!isusersystemadministrator,local!designerUsers),
index(local!designerUsers,where(local!adminUsers),{})
)

The default Designers group contains all system admins by rule, but non-admin users can be added to the group so the second step is needed.

You can use this expression as the basis for the desired report.