Sections do still exist in GP Premium, and will remain forever for backwards compatibility.
As the new Block Editor replaces their need we recommend using our GenerateBlocks plugin instead of Sections – they’re much more advanced:
I found a block called “cover”. I think it is part of the default blocks in the gutenberg editor. It allows an headline with a background image but when I tried it out, it didn’t look great so I am leaving it be! Thanks for your time.