Crankwork can make your SPDs into flats with its adaptors
Amazon.com : ROCKBROS Clipless Bike Pedal to Convert Flat Pedals Universal Platform Pedal Adapters for Shimano SPD System Mountain Pedal MTB Bicylce Pedals : Sports & Outdoors
Pedal Plate SL – Adapters for Shimano SPD-SL pedals – No additional cleats needed | Pedal Plate
Mountain Bike Clipless Pedal Platform Adapter Convert For Shiman Looking Keor System Bike Clip Pedal Adaptor - Bicycle Pedal - AliExpress
Binding Pedal to Flat pedal adapter & SPD Cleat Set| SPDペダル フラットペダル化アダ - Dragonbike
ADD-FLAT adapter for Shimano XT and XTR pedals – TATZE
The Lab: TATZE ADD-FLAT Adapter Review | ENDURO Mountainbike Magazine
PP Pedal Plate | SL | Adapter compatible with Shimano SPD-SL clipless pedals | Converts clipless into flat pedals | No cleats needed | Adding grip and comfort : Amazon.co.uk: Sports & Outdoors
Review: Every cyclist should have Pocket Pedals' slip-on platform pedals - Bikerumor
Amazon.com : Thinvik Clipless Pedal Adapter for Shimano SPD Pedal - Clip Pedal Convert to Universal Platform Pedal - (Only Work on MTB Bike Pedal : Sports & Outdoors
Crankwork can make your SPDs into flats with its adaptors
Adaptador Plataforma para pedales SPD MASSI
Shimano SM-PD22 SPD Cleat Flat Pedal Adapters MTB Pedal Adapter Mountain Bike Pedals Converter - Walmart.com
Platform Flat Pedal/ Pedal Adapter for MTB/ Road SPD/ SPD SL Clipless Cleat pedals, Sports Equipment, Bicycles & Parts, Parts & Accessories on Carousell