Did you check the Forms page in the Settings for the site in Netlify?
Another spot to check is in the Settings under Build & deploy -> Post processing, to ensure you have the Form detection enabled.
The Netlify documentation here (Forms setup | Netlify Docs) states:
When Netlify bots parse the static HTML for a form you’ve added, they automatically strip the
data-netlify="true"ornetlifyattribute from the<form>tag and inject a hidden input namedform-name.
When looking at your URL I still see the data-netlify="true" data attribute on the form, which would lead me to believe the bots haven’t parsed it… but I also see a hidden input named form-name.