There are few bars down “Walking Street” in Bui Vien, next to District 1.
I’d walk by night/day before check which ones are showing AFL and enquire.
I’ve kinda been based Vung Tau (2 hours south by ferry or bus) last 8 years - Covid excepted.
Expat Aussie popn down there and I can recommend Tommy’s Bar.
Mine host, Rob from Hobart is ex Camberwell, Hawk supporter and mate of Gary Baker.
Currently I’m in Luzon, Philippines and have AFL LIVE on my phone. $40 month - all games.
They do a weekly subscription as well I think.
Message back for further info