It's a $1.6 billion defamation suit, so still a bit less than 10% of Fox Corp. They'd feel it, but not enough to shudder their doors. And judging by some of Tucker's ongoing behavior, it's pretty unclear to me that a loss for Fox would really change much besides the network telling slightly more legally-defensible lies.
I wonder how much the judgment would matter to Comcast/Charter/Etc's carry packages. Fox is a net loss from an advertising standpoint; at this point if Comcast were to decide you need to opt in to buy Fox News they'd be dead in six months. There will come a time when the country has decided Fox is too toxic to be subsidized and when that happens it will vanish with a quickness. Really, the only thing that gives them an edge over NewsMax or NRATV is legacy.