Have you kept the receipts? That's the trick to be learned here. Pay medical expenses out of pocket, let the HSA grow tax free, and withdraw at some later point. You don't have to directly pay a medical bill from an HSA account. You can reimburse yourself later, even much later, as long as it was an expense incurred after you opened the HSA account.
That's why I'm puzzled when you keep talking about specific uses like dental. You don't have to be. You can have $5K in other medical bills, $10K in Medicare premiums, and $10K in dental and you've covered tax free withdrawal on the whole $25K.
Mileage driven for medical purposes are also reimbursable. Worthwhile for me because my providers are 20-40 miles away.
I keep a spreadsheet one line per expense. When I get a bill, I make an entry in the spreadsheet, and give it a code like 2022-01 for the first expense of 2022, write that code on the bill, and scan the bill and file it on my computer. And I also put the receipt in a shoe box, on top of previous receipts so that they are all in order. No need to do both, but I did the shoebox for years and only started scanning a couple years ago.