First grow critical cheese 40inch tall running out of room in the tent

In my eyes, all you can do at this point is try to tie/scrog them down if the stems are flexible enough to do so.

bro can u give some photo and its a photoperiod or autoflower ?? if its photoperiod u can use topping metod or super cropping method if u put here some photo can i help u

They look pretty stretched man, try tying them down and lowering your light a bit perhaps? Are the stems still flexible or are they woody? You might be able to do a bit of an emergency scrog / supercrop

At first, well done for a first grow, some growers don’t even reach the flowering stage. It’s the first sign of a good grower problem. Unfortunately there’s not much that you can do, maybe except bending the main tops using a Low Stress Training method, you will get a few inches lower.

I can't see a picture but you could try a high stress training method and bend the branches over to almost breaking, it's called super cropping. Have a look at growweedeasy.com and search for supercropping and see if it will help you out.