Ask HN: What is your way to go for serious iOS bugs?

I know this is not stackoverflow but I guess this place is crowded with people that have more insights into apples internals.

I discovered a serious iOS bug:

https://stackoverflow.com/questions/79905933/ipados-26-crash-when-floating-num-pad-in-presented-view

This has to bother thousands of developers and users. How would you approach this? File a radar? I only heard negative stuff about that. Contact your friends at apple? Well I don’t have any. What is your way to go?