Not receiving Apple receipt emails

Just noticed that I haven't been receiving Apple receipts in my emails since March 2021. I have consistently used the same .mac email as my Apple ID for years. I can see the charges in my iTunes account settings, and I can even click on "Resend receipt" but nothing happens. (Obviously, I'm also getting billed on my credit card as well.) I am not receiving the email receipts.

It's just very difficult to print the receipts for invoicing/PO purposes from my iTunes account. Apple should have at least have a "Print Receipt" or "Download PDF of Receipt" option in iTunes Store account settings. Highly annoying.