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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
Without disclosing too much, I am fairly involved around this topic, and I would say it's definitely heading for deprecation this year. The key giveaway is that Google Analytics 3 will be shutting down in July[0] and AMP has made no progress towards supporting Google Analytics 4[1]. I think it'll be deprecated at first rather than shut down because there are still billions of AMP documents floating around the web.
[0] https://support.google.com/analytics/answer/11583528?hl=en
[1] https://github.com/ampproject/amphtml/issues/24621