It works perfectly well with the embed codes suggested on the Twitter website if I use it in a classic website or even on Android using Cordova / Ionic.
However it does not work when running the same code under iOS. The network requests can be seen but the embedded HTML stays “unrendered”.
There are lots of threads around the web (and here as well: Unable to embed timeline in Ionic App but closed whatsoever). I cannot find real solutions so I try to open up this topic again and bring it to a solution hopefully.
If more info is needed I am happy to provide everything needed.