use custom grids in leaflet

Question

is there a way to use/transform from the custom grid in this WMTS Capabilities to the osm grid to use the wmts with leaflet ?

I'm using the leaflet-tilelayer-wmts plugin and i cannot display any tile from the wmts linked above due to other tilenames and grid. Both my map and my requests are in EPSG:3857.

var ortho = L.tileLayer.wmts('https://geodienste.sachsen.de/wmts_geosn_dop-rgb/guest?', {
    layer: 'sn_dop_020',
    style: 'default',
    format: "image/png",
    tilematrixSet: 'grid_3857',

});