Can't use function from refs like in Demo

[SolimanGit]

Hi ! So very simple request, i did as in the Demo but i can't access function with refs... Console.log(osm) does an output with everything but osm.value = null.
My goal is to retrieve the resolutions from the tileLayer to try to not have a blurry map anymore.
PS: If you have something so prevent a background blurry map like leaflet you will have my deepest thanks
const osm = ref(null) console.log(osm)
<ol-tile-layer ref="osm"> <ol-source-osm /> </ol-tile-layer>

The output of console.log(osm):

[modelair]

mb u try to log it before map initialization?