I don't have any sofas that seem to have a sliding cushion issue, most are just fine and have no special attachment points. If kids are jumping and rough-housing on the sofa - and being kids on it - I would expect the cushions may not be staying in place all that well. You can specify Velcro attachment points on the bottom at time of order, that's the best solution.

Yes, Taylor King does sleeper sectionals, you have to go into their Sleepworks segment, here's the link to the .pdf:

https://www.taylorking.com/PDF/Category/30_no_logo.PDF