Im getting better at my ollie 180's but will stance width affect how high you will be able to ollie or is it more technique? thanks

well, a super narrow stance will make it hard to push the tail down into the water because there's more tail to push down.

If you want to improve your ollie, try wakeskating a little while. That will definitely improve you technique

Or skateboarding, my ollies were just decent before i started skating last year, now they're pretty legit.