Not much more. Hamas is under a near total embargo with checkpoints manned by Egypt and Israeli soldiers. Not easy smuggling military grade explosives and technology. What has made it thru is testament to how difffukt it is.And more importantly what do you think Hamas will develop in 5, 10 and 20 years?
HZ on the other hand is part of the Lebanese government and has much more open access to receive technology as long as it makes past Israeli air strikes in Syria.
So I wouldn’t compare future Hamas capabilities to HZ/Houthis. Completely different scenarios.