Alex Schroeder has an ‘Alpine’ hex map generation option in https://campaignwiki.org/hex-describe/ . This allows you to tweak heights for maps.
Also in TextMapper similarly. However, his native Switzerland and Australia are somewhat different in size and smoothness.
These are great and the code is also here:- https://github.com/kensanata?tab=repositories
You can see the power law distribution dropoff for Australian terrain, whereas Switzerland is much more elevated. e.g. Australia is an old, worn down continent, geologically.