Smoker/grill as a gift for someone who wants to make both smoked meats and Peking duck/Chinese BBQ

I want to buy a smoker for my mom this Black Friday, and she wants to be able to make traditional American smoked meats like brisket, but also Chinese BBQ food like Peking duck or charsiu.

I’ve read the amazingribs.com guide and also watched their Youtube video about buying grills and smokers, but I never see any discussion of Chinese BBQ and what may be required for that. Meanwhile, when I look at Chinese Youtube, there’s never any mention of smokers/grills/etc, it’s either a hacked-together home set up or a traditional Chinese industrial commercial oven set up.

What kind of grill/smoker should I buy? Kamado, pellet grill, WSM, or something else?