It’s definitely not remotely equivalent to a levels, I’ve done both and access literally cover like the first half term of a levels and that’s it. It kinda depends what you want to go into, if you don’t need the in depth chemistry knowledge and all the plant bio it’s kind of a bonus…
Luckily I’ve not had any issues because I had the a level knowledge there but a few of my peers have struggled quite significantly with just access course knowledge. I would recommend doing a lot more in depth learning on cells and everything relating to them which can be done through textbooks, YouTube, and apps like anki/quizlet