hey maybe it a lot to ask but can u add custom research. like nuclear technology or weapons and equipment something like that

I belive it is planed 

i been waiting 3 years

I mean if you really want to you could do it yourself ( use https://hoi4.paradoxwikis.com/Equipment_modding for reference) 

I'm just saying the people who run this site been saying that then will add it, this was 6 to 4 years ago on a YouTube video I'm just asking for a update