Unlike other robo-advisor who have 30-40 ETFs, Wahed has only 4, because there are not a lot of shariah complaint ETFs out there in the market.

For US equities, they will be deploying their own ETF, which you can find here:
https://funds.wahedinvest.com/

Seeing that their top holding, Apple, issued their own credit card which has interests, you ownselve judge where it is shariah compliant or not.

For Gold they deploy this Gold Tracker: https://www.tradeplus.com.my/

MYR equities, im not entirely sure, but it should be local shariah complaint funds, not individual equity.

So for your different risk allocation, it's just different weightage on these 4 instruments. No different instruments for different profiles.

Talked to the Malaysian branch head, used to work for PNB, seem to be steady fellow. But for the founder himself...meh