Set switch on/off and save each change to the collection.

Additional to Anthony’s reply, you could take a look at one of the examples on my site…
https://russian-dima.wixsite.com/meinewebsite/switch-safe-function

import wixData from 'wix-data';

//------------------------------------ USER-DATA-INTERFACE -----------------------------------------
//var DATABASE =    "Switch-Save-Function"
var DATASET =   "dataset1"
//------------------------------------ USER-DATA-INTERFACE -----------------------------------------
var currentItemIndex

$w.onReady(function () {
    $w("#"+DATASET).onReady( () => {
        $w('#TXTmember').text="Member-"+currentItemIndex
        $w('#BTNsave').onClick(()=>{
 if ($w('#BTNswitch1').checked===true){$w("#"+DATASET).setFieldValue("btnStatus", true);}
 else {$w("#"+DATASET).setFieldValue("btnStatus", false);}
            $w("#"+DATASET).save();
        })

        $w('#BTNnext').onClick(()=>{console.log("NEXT")
            currentItemIndex = $w("#"+DATASET).getCurrentItemIndex()+1
            console.log(currentItemIndex)
            $w('#TXTmember').text="Member-"+currentItemIndex
        })

        $w('#BTNprevious').onClick(()=>{console.log("PREVIOUS")
            currentItemIndex = $w("#"+DATASET).getCurrentItemIndex()+1
            console.log(currentItemIndex)
            $w('#TXTmember').text="Member-"+currentItemIndex
        })
    })
});