Ilyapa Washer and Dryer Stand - Universal Wooden Laundry Pedestal Base with Drawer and Anti Vibration Pads - 400 lb Weight Capacity Washer Stand, Compatible with Samsung, LG, GE, Maytag - 28x28x16 in.

Check if you can get something like this, and install it below the sink cabinet (check the height of base board). They are easily removable. https://www.amazon.com/YJEUZCD-Pull-Out-Organizer-Entryway-Retractable/dp/B0FHJ131P5 Theu are called rebound shoe shelf. You basically push-kick to open, and kick to close. For large shoes, I see that your washer dryer has some space above the washer-dryer. These are heavy, but with the help of 1-2 friends, you can install something under the washer-dryer. They are called laundry pedestals https://www.amazon.com/Ilyapa-Washer-Dryer-Stand-Compatible/dp/B0D1ZKYDZH.