Pathfinder 2e Spellbook Question

I am currently making a Pathfinder 2e druid and unless I'm missing something there isn't a way to mark spells as prepared in the character sheet. I see where I can select whether I am a prepared or a spontaneous caster but not how to show individual spells as prepared or not. Am I missing something?

You're correct, there is currently no way to indicate prepared spells. The Official PF2E sheet thread does mention it as one of the feature in development. Haven't seen any ETA for it yet, but I suggest you follow that thread if you want to keep up with hints at developments. The weekly Changelog do inform us of updates to Roll20 and Official sheets, but that thread might contain some extra comments that could in advance tell us about upcoming smaller changes like the "Prepared Spellcaster Indicators".

Thanks I'll have to take a look, for now my DM have a decent work around. Thanks :)