Thank you very much for your reply, but still no luck.
I was beginning to think I’m putting the code in the wrong place. So I have tried both your option (Appearance, customize, add CSS) and I have also tried the following:
I go to editor and into the header and select navigation from the list view.
On the right hand-side in Block I select the wheel and scroll down to ‘additional CSS’ to add CSS.
When this didn’t work I tried putting the code higher up in the hierarchy, in the group that defines the entire header.
Still nothing changes to the size of the icon. I have tried with with and height at 60 and 80 as well…
If you have any other ideas? Again, I’m working in the 2024 version of WP.
Thanks again!