SRAM freehub/elitewheel freehub question

I’ve recently bought a second-hand gravel bike with SRAM Force 22, 11-speed, 1x. I’m looking to replace the existing heavy wheelset with a set of Elite gravel wheels.

However, in the future I plan to upgrade the groupset to Shimano GRX. This raises some compatibility questions. I can’t afford to replace both wheels and groupset at the same time, so the plan is to buy wheels now and upgrade the groupset in around six months.

I’ve seen that the Elite SLR gravel wheels have swappable freehub bodies, but I’m unsure which option I should buy.

When I took the bike in for servicing, the shop told me it has an XD freehub body. But since the bike is 11-speed and 1x gravelbike, wouldn’t that normally be XDR?

Elite offers a SRAM XDR 12-speed freehub, but my current setup is not 12-speed. Would an XDR freehub work with an older 11-speed SRAM Force cassette?

Alternatively, would I need to buy:

• a SRAM XD/XDR freehub now, and
• a Shimano HG freehub body later when I upgrade to GRX?

I’m getting a bit lost with all the standards and compatibility issues. Any guidance would be much appreciated. Thanks in advance.