Website barely loads on my old phone and I can't see any examples of the syntax.

Hey - maintainer here. Sorry about your bad experience and thanks for mentioning it! The Core Web Vitals test did come back ok - but evidently there's more to do so will get that sorted. (Web design not a strong point! ). The code examples should be showing on smaller screens when in landscape on mobile (they looked awful in portrait) - but will also look at that as well!

Could I possibly ask you to reply with the model of your phone so can make sure it works ok after have fixed?