Opensuse 15.2 on Thinkpad T14 How to enable UK keyboard dead keys

As posted above, using a Thinkpad T14 (Ryzen 5) with a UK keyboard. As I type in multiple languages (French, German, and English) I need to enable dead keys. I have selected UK keyboard with dead keys in the KDE settings, but it does not appear to be working.

Any ideas?

Thanks in advance