Yeah, use roomy bags, the hops need to be able to swim!
To force refresh the wort inside the bags more aggressively I lift my hop bags up during the boil and let them mostly drain out over a long brew spoon or wooden paddle, before lowering them again. I do that maybe every 10 minutes. In addition, I also "massage" the bags with the brew spoon or a wooden paddle, while in the boil.
Even when using fairly fine mesh hop bags, the finest mesh I can commercially find, a lot of very fine hop dust still makes it out, and mixes in the trub. My last 6 gallon batch of NEIPA (4 oz of hops in the whirlpool) left behind almost a gallon of trubby wort on the bottom of the kettle. I strained it through the same fine mesh hop bag placed in a large funnel. After it settled, I had salvaged 3 quarts of perfectly clear wort.* There was about 1 pint of super gooey sticky trub left in the filter bag!
I pasteurized the reclaimed wort at 160F and is bubbling away in a gallon jug. I may use it to top up the keg after transfer if I come up short. Or just carbonate it in a soda bottle.
* I adhere to the mantra: No Wort Left Behind!