Reading standards for earthquake resistant construction and interiors. Heavy appliances are supposed to be fastened to a supporting wall stud. Generally, in a high earthquake risk area, everything should be strapped, bolted, or epoxied to something that will move with the foundation with minimum swing or wobble. How do you accomplish this in an ICF home?

Where I needed or wanted a good solid anchor to a wall I used Red Head anchors in the concrete. https://www.homedepot.com/p/Red-Head-3-8-in-x-1-5-8-in-Steel-Drop-In-Anchors-50-Pack-01891/100154222. Drill a 1/2" hole, put the anchor in, use a solid rod and hammer to drive the wedge plug in hard, and use 3/8" bolt or all thread to fasten the item. If you know exactly where your anchor points need to be another good approach are Simpson ICFVL anchors. https://www.strongtie.com/concrete_miscellaneousconnectors/icfvl_system/p/icfvl. They're intended primarily for ledger board supports but they would work for pull out anchors if the design pull force requirement isn't horribly high.

If the quake code allows screws into wood for anchorage you could use the Red Devils to fasten something like a 2 x 6 to the wall (remove the foam for it) and fasten your shelves or whatever to it.

Ask the block suppliers for leads. Lots of homes in California have been built with ICF and I'm sure many of them meet the quake code requirements.

Also, check with your ICF provider to see if their attachment webbing is rated.
Remember, some have high-load secondary mounting points in their webbing.

Otherwise, as noted, you can go with direct-mounting into the concrete or pre-pour placement of brackets/bolts/ledgers so you're not having to actually drill into your nice new concrete wall.