The bent variety are commonly fitted in 2.5" wide tyres such as CST 10x2.5 "Street" Tyre, this is a stock tyre on T10-DDM tyre in (Zero 10 & 10X, Dragon X10 & MiniWalker), VDM-10 (Bolzzen Dynamo & Gladiator, Dragon Raptor & e-Glide Mach 10) and and Kaabo Mantis series scooters.
Regarding the bend:
0 degree angle, which runs parallel to the tube (typically used in non-motor hubs),
45 degree (ish) angle,
90 degree (ish) angle at 90 degree tilt, as shown in product image with silver coloured valve stem. This is most common for 10" motor hubs in larger scooters.
Notes:
These tubes can often be observed with a 2/2.125 nameplate, which implies 2" and 2.125" compatibility.