[kabes]

no, openlayers supports vector tiles out-of-the-box and leaflet with a plugin

[tuukkah]

True, OpenLayers and Leaflet have some support for vector tiles. However, you cannot rely on it because the performance is not there to render a normal map. Alternatively, you can use maplibre-gl-leaflet to integrate the two but it's experimental with some significant caveats.

[karussell]

You can use vector tiles with openlayers but they draw it on the canvas and not via web GL i.e. it is slower.