limited admin access to facebook page, but this page is the only admin to ANOTHER page. how do i access the second page?

weird, i know. i have limited access to this company page, ran by boomers that don’t know how to work facebook. they somehow managed to make this company facebook page the ONLY admin to a private facebook page for employees of the company. so main company page is admin to private facebook page. nobody can figure out how to access this second page, and im confused navigating facebook meta business. i’m assuming my permissions also need to be changed. people are trying to join this private group within the company and it needs to be updated and i am at a loss! can you tell me how i can access this second page?