Detergent sheets are fairly common in the UK - I use https://www.amazon.com/Dr-Beckmann-Original-Laundry-Detergent/dp/B0B1HXXLLL https://www.amazon.com/Dr-Beckm

Detergent sheets are fairly common in the UK - I use https://www.amazon.com/Dr-Beckmann-Original-Laundry-Detergent/dp/B0B1HXXLLL https://www.amazon.com/Dr-Beckmann-Original-Laundry-Detergen... when travelling and they work well enough.