Hi,
Thank you for reaching out to our API support team.
You can gain access to them by using your manager account on the left side panel, clicking on accounts, then finding a blue circle with a plus sign in the middle of the left side of your UI, then clicking Find link existing account. Copy and paste their customer ID that you want to access. It will send a request to the account, which must accept your request in the account access manager page. For more information and a guide, you can visit it here.
Also, if what you are asking is to retrieve the accounts that you are seeing in the provided UI, then I would suggest using the List Accessible accounts feature.
Best,
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| Anthony Cyril |
| Google Ads API Team |
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