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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.
This is definitely better than many of the alternatives but still not perfect. With Zigbee etc you end up locked into one or more of the ecosystems, not to mention some manufacturers implementing it in a way that has weird quirks (see [1]). With esphome you have a limited choice of devices (would love to see more), but you also usually end up locked into keeping a 2.4GHz WPA2 AP for your devices (and you miss out on mesh, but also the problems when it doesn't work...)
1: https://github.com/Koenkk/zigbee2mqtt/issues/16717