Hello. Welcome to the forum.
I have listed the sheet names in column U (for example) and created a dynamic range named Sheets with this formula:
Then I use this formula in N9, copied across to Q9 and down:
This formula works from July to December only, as the dynamic range spans back 6 months, so it will result error when current month is June or earlier. For that part, you could stick to the first summary table, with those formulae you have entered.
Please run some test and let us know how it goes.
Good luck!
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