I am person with worse eyesight and because of that I use big 4K sceen with Windows scaling set to 150% to be able to read easily. But for some other applications I need to use even further scale-up. So far I am using FireFox and there I have set additional scaling:

Point is that it applies (can apply) to not only text but also interface. Which is something I am missing in Opera. I can zoom text to my liking but bars, especially tabs, are too small for me and I do not have option to make them larger other than scale up UI for whole Windows, which mess up other things.

Please add feature to scale UI of Opera so it is easy to use by us people who are no longer in our teen age