Need help removing this driver. Locknut is off, but it won’t slide out.

Hey everyone,

​I'm trying to service my rear hub and clean/lube the pawls, but I'm stuck. As you can see in the pictures, it's a sealed bearing cassette hub.

On all the video I've seen, they just slide out the driver to access the inner part and clean everything.

I tried pulling it by hand, but it won't budge at all.

Before ​I break anything:

​Is there a specific trick for this type of hub?

​Should I just soak it in penetrating oil (WD-40) and pull harder?

​Should I gently tap the axle from the drive-side to push it through, or tap from the non-drive side?

​Any advice or tips would be hugely appreciated.

Thanks!