Do you know a service, or maybe a module for cms to create tests on which these sites are made?

Question

CMS

I would like to know what these tests are made on - https://alr-kadastr.ru/ and https://vseslav-pools.com/test . Judging by their fundamental similarity (even the icon is the same), they were made either by one person (copied from one place), or on the same service, or module, or on some other ready-made solution.
Please tell me if you know. Thanks in advance

Answer 1

Judging by the sources, both sites are made on some kind of landing page builder, and these polls are apparently included in the functionality of this builder.
UPD: in the source code, classes have the flexbe prefix, most likely this is this constructor.