Sounds like a hacking scam cuz your vaccine lot numbers are tied to your name/DOB and your medical records.
All that info is on your vaccine card.
Would like never Fucking do that in a million Fucking years.
Might as well just fax them your drivers license/phone # & Social Security card.
Anyone putting that info on a website ain't dead or adverse.

I also see no [httpS] S as in Secure on that URL, prolly going right to the Kremlin.