Is there a way to make it work with Safari or Chrome mobile?
Iphones are pretty picky about browser extensions.
I succeeded in using the @babo extension in Safari using user script, but I somehow failed with this one.
[userscript] enhanced mobile mode v1.3 [!]updated[!] Actually, I don't use the iPhone as well as don't have the experience of Safari if safari supports the extension then it's possible. And if Safari have any limitation on using extensions then maybe you will face issues and I think what you are facing.
Have you tried the Yandex browser? I sawn in multiple posts and sites that Yandex supported the extension in IOS. And if even after trying the yandex you failed to use it maybe there is also need some edits in scripts to use in iPhone.
I never heard of Yandex.
I hope that someone will take on the effort to implement the code in a standard browser for IPhone, without the hassle and associated risks of using an obscure browser.
In case, I will use that extension from desktop only.