Except making a hybrid wouldn't be anywhere near that easy. The packaging alone would make it so much more difficult and impractical than a full EV conversion. Sure, go ahead and attach electric motors to the undriven axle. Wait how are you going to do that? It's going go take a complete redesign of the suspension. Even if you did that your going to need the space occupied by the ICE drivetrain and it's supporting equipment to locate the controllers and batteries. Even if you limit the range to 40-50.miles, it's still going to take a lot of space. By the time you put that much effort into building a hybrid, you're nearly at the work required for a full EV conversion.
It is almost that easy to do in a Ranger 4x4 (actually any 4x4 with part time transfer case works, easiest with automatic - less software to support shifting of manual):
Remove 4x4 transmission and transfer case (theoretically, we replace the 4.0 with 2.3 Duratec; a 1.5l Ecoboost Dragon would be even lighter/more compact but there might be some bellhousing issues, to save some weight/as we don't need power of 4.0. In place of transfer case we put a splitter to allow disconnecting rear axle when running in EV mode (might want to retain the low range gears for the box).
Install electric motor where transfer case was, connect it to front axle driveshaft.
Remove spare tire and carrier - install battery pack where the spare was. Install spare tire carrier in box ala Gen 2 Rangers with rear tank. If you want to get cute, put a charging jack where the rear tank filler would be so you can charge battery anywhere there is 110v power. (Really fancy you can set it up for Tesla chargers).
Replace throttle pedal/cable with throttle by Wire, Replace the brake cylinder pin with spring/resistor one (needed for regenerative braking).
You want electric a/c and steering, and hydro boost brakes. If I need heat in the morning, I'll run the ICE - using battery to heat coolant is extravagant use of electricity (but it might have advantage of keeping engine warm to reduce start up losses).
Wire up black box under hood linking battery, motor, engine, throttle and brakes. The more you spend on software, the closer it will feel to OEM.
The Ranger will start as front wheel drive EV, back out of the drive and quietly take you to work and back for pennies per km. If you need to drive clear across town, the ICE will kick in when battery gets low.
When you're hauling load/towing trailer, you thumb the switch into tow/haul mode and Ranger runs primarily on ICE, with electric motor to assist in accelerating, hills, etc.
In Sport mode, you get ICE and electric motor together (its also 4x4 mode).
Performance and capability is more/less identical to the historic ICE truck.
The challenge - the "conversion" is probably over $10k (maybe double that these days; I haven't actually costed it) - long time for payback...