A device in 5g vs one out of the list - average speeds

Hi

I have switched provisionally to S believing I would get unlimited 5g but it turned out there is 'small print' for that, with a list of 5g devices which actually do receive 5g. unfortunately, my pixel 5 is not listed, and is not getting 5g. The speeds at home are in the ballpark of 4Mbps DL and UL, so I think it is a lower extreme for 4g actually. 

Have had some bad experiences with ee (same phone) where apart from roughly the same speeds, internet would go dead for minutes - very annoying when on msteams with a client.

To cut to the core, will there be perceived difference if I buy a device from the list of 5g tested ones? I would have thought 5g meant 30Mbps on average, or else it should be called 4g. I know th 4g-5g distinction is about the technology of transmission but still, when I switched from 3g to 4g back in continental europe 15 years ago, I was getting speeds better and more consistent than now with "5g".

Has anyone compared devices in and out of the list? What speeds did you get?
Thanks