Hi cardinalpipkin,
Please try to use the button trigger. Choose the Text type as user input, then click the ellipsis, select “Add a list of options”.
Then you will be able to enter several email addresses of the approvers.
Followed by the Button trigger, add the action “Send approval email”. In the To field, select the dynamic content of “email”.(In this case, I named the list options as “email”. You can name it according to your needs).
Then when end users click the button to trigger the flow, they will be able to choose an approver prior to starting the flow.


Hope this could be a reference for you.
Best regards,
Mabel Mao