Hi there keoki98,
Thanks for taking the time to reach out to us here in Apple Support Communities! We understand you're not seeing the option to add verifiable vaccination information to Apple Wallet on your iPhone. We're glad you're here, and we can help.
"You can download verifiable vaccination and test result records if your vaccine or test result provider supports this format. Check with your provider to see if they support verifiable health records." With that said, have you contacted your provider to see if they support verifiable health records? Have a look at the related article linked in blue at the top left corner of this page for details.
Also, this link provides information about supported technology for verified health records:
SMART Health Cards
We hope this information is helpful. Don't hesitate to let us know if you have any more questions.
Take care!