>>194349239Nowhere. Unlike the chapter that was posted, the rest of the spin-off is serialised on bi-monthly magazine Saikyo Jump. Said magazine is physical-only, and most scanlators nowadays rely on digital rips.
To keep it simple, nobody's that interested in paying a random wanker in Japan to scan a copy of an minor magazine full of spin-offs and shitty comedy series for the express purpose of scanlating Team Up Mission, so regular updates are not going to happen.
With some luck, someone will eventually rip the volume release, and scanlations might follow.