It's very soft, like nothing happens until I'm getting close to the bottom, or at least it's very weak braking power until getting close to the bottom.

They shop said it takes a long time to bleed each corner for air.

I did call them up and they'll look at it on Monday. 2009 L322 4.2 Supercharged

Yes, it's been bled wrong. I'd expect them to use a power bleeder on something like this. If they're doing it manually, the old fashioned way, it might be a lot harder to do.

If you can pump the pedal a few times and the bite point raises, that would suggest air in the system too. 2017 4.4 SDV8 Autobiography in black
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Spiffing wheel centre caps, L322 sill repair panels, etc

They did say, before they started the job, that it would take 2 hours per corner, or if it was 2 hours totally, just to remove the air. I found it quite a long time but I don't know as I've never done it mysef, only been watching DYI videos for fun.

I'll try pump the pedal and see if bite point raises, thanks for the tip!
What if the bite point don't raise? 2009 L322 4.2 Supercharged

Nope, they’ll need to run the ABS pump whilst bleeding, I bet they didn’t!
FFRR’s are a pig to bleed if you don’t have the right gear and know what you are doing.
Take it back and tell them you’re not happy, it doesn’t feel safe if you have to make an emergency stop etc. “If it ain’t broke, don’t fix it” -where’s the fun in that?

Thanks! I can give them this as an advice to them.

What do you mean with "run the ABS" pump? Is this documented anywhere so I can share it with the shop manager? 2009 L322 4.2 Supercharged

A diagnostic device is required to activate the abs pump whilst bleeding the brakes .
Ask if the gap iid tool can do this . The Foxwell NT 530 pro is not expensive and a Land Rover specific version will be available but check with the supplier that it can do that function for Land Rover vehicles .
Do a full system flush with a pressure bleeder then do another bleed with a device to activate the abs pump and have a person press and release the brake pedal every 3 seconds while the abs pump is operating . A lot of fluid will be released when doing this so be sure to have plenty fluid in the pressure bleeder . Best have at least 5 litres of brake fluid available .

Each time the abs pump is activated it will probably operate for about 30 seconds and when it stops then keep the bleed valve open until another 150ml of fluid has flushed out

Need a correct type charger to fully charge the battery and then switch the charger to power supply mode when activating the abs pump for brake bleeding . Something that can supply 25 amps and preferably much more amps . Give the battery time to recover after bleeding each caliper .