I don't know them directly but I've been a customer for a long time and I know they really struggle to get shipments out to their distributor in Germany due to Israel blockading them.

I think what that means is that it can be really hard for them to know when they'll get more stock and what stock they're going to get in. Which means that their distributor is probably going to be very reluctant to take backorders because they don't what to deal with a bunch of refunds or angry/disappointed customers who haven't had their order shipped for 6 months.

Obviously they do limited amounts of pre-orders at times but you should consider hitting them up to request that they start offering gift vouchers - that way you'd be able to provide them with financial support and you would be able to cash in and get your keffiyeh eventually, once they've got the colour you fancy in stock.