your pitch deck should be crisp and short. 10-12 slides max. its core should be your product & the problem it solves, your market, your team, your execution path (timeline, subs, revs, cash burn) and your use of proceeds (cash needed and what you deliver for that cash). that's it. don't go into telling historical background, deep product specs, too many details about the team etc, that will be what you deliver once an investor is interested beyond your pitch.
you can use pitchxo.com as a template to track your deck's readers and be smart in your follow ups.

Happy to review your draft deck and give you feedback. I review over a 1000 decks per year, I see which ones get reactions and eventually funding, so I have a pretty good idea of what works and what doesn't. Give me a call.