Please can you tell how can I see, who has create a policy and also can you tell me, which role allows to create a policy.
It is not possible to check it on the UG site as Policies are created on SP .
The way you can check is by logging into server where UG is installed- Open SQL Management - UserGovernance database and then Right click - New query Run -
select * from policy - Press F5 ; it will display the table with all the entries; see screenshot below.
Only Site Admin or System Account can check this.