i have b550m mortar...toatal of 5 case fans connected, no problem, i would never ever in my life use a "hub" ... otherwise its pretty motherboardy too and things just seem to work, no additional software needed either.
i do have those little double header noctua cables tho they always throw at you, i think two of them connected, not sure I'd even need them, it was just more practical/ nerdy that way!
you can buy them for cheap, i think 4 bucks each!