Yes, you can set the Do Not Stack on Mobile option to be enabled by default by overriding the row tool’s configuration during editor initialization. Use the following code:
unlayer.init({
// ...,
tools: {
rows: {
properties: {
noStackMobile: {
editor: {
_override: {
mobile: {
defaultValue: true,
},
},
},
},
},
},
},
});