Hello Team,
Right now there is an action called Recurrence that will help you out but this is only possible with a single date.
For example please see the screenshot below-
This will run your power automate solution on 1st day of every month, the thing is we can only enter one date here.
Right now the start time on this one is 1st October 2020 at 10:00:00 AM
So 2020-10-01 means YYYY-MM-DD
T is just a separator
10:00:00 is hour:min:seconds
Z is the time zone information I have selected above (Indian Standard time in my case)

So using the configuration above your flow will recur on 1st day of every month, irrespective of how many days are present in the month 30/31.
Multiple dates are not possible as of now.
You can upvote the idea raised over here-
https://powerusers.microsoft.com/t5/Power-Automate-Ideas/Recurrence-to-run-a-flow-on-a-particular-day-of-the-month-For-e/idc-p/296254#M9373
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