Mine don't. I'm always disappointed if they go on playdates and I learn they spent a lot of time on the other kid's tablet. Lots of comments here about demonising tech and the importance of balance, but the issue IMO is that for lots of kids these things are addictive, isolating, and sedentary, and they absolutely do take away from imaginative and physical joint playing. It's also worrying because you don't know what age safeguards are on other children's devices.
I've had a little girl of 7 round who asked persistently for her iPad over several hours, despite clearly having fun doing other things and wanting to be with the other children (I eventually caved and popped her home for her iPad, thinking I'd leave her there, but she asked really earnestly to come back to my house, where she spent the rest of the playdate staring at her tablet and periodically trying to get the other kids to do the same).
If I've got kids round for a long time and they have been very active and want to chill, or if they just aren't clicking, I will let them choose something on the TV. We host a lot and this is very rarely necessary.
The comments that are more pro playdate tech seem to be about communal gaming. I can imagine permitting that to some extent if my kids were in to it, because it's not quite the same as little kids parked on their individual tablets. That said, I'd rather my kids (8 and 10) continued to play physically/ imaginatively for hours with their mates.