Oof. Suction cups? I can already hear it coming loose and hitting the floorboards.
I’d be pushing for something more robust like a clamp-on/bolt-on RAM mount or something. We put RAM mounts on forklifts for iPads and barcode scanners, and they’re nigh indestructible.
The mounts we used went through an airworthiness and crash survivability review. The ones I'm familiar with had dual suction cups and the cups themselves were pretty significant.
Suction cups are extremely secure when used correctly (clean flat smooth surfaces). GoPro advertises theirs as secure in a 150MPH wind when used correctly.
I would hope they are something really robust like the suction cups used to move large pieces of glass around. Still seems like an odd choice given the variety of temperatures and pressures experienced in flight.