A few things:

- A data source for vector tiles; there's a lot of options: https://stadiamaps.com (my company), https://maptiler.com/ & https://jawg.io (other core contributing companies), among others.

- A style that matches. I'm not aware of an open source style that closely mirrors OSM's style using MapLibre GL Styles (also forked from Mapbox). OSM Bright is pretty close: https://github.com/mapbox/osm-bright / https://github.com/openmaptiles/osm-bright-gl-style.

The OSM style is here: https://github.com/gravitystorm/openstreetmap-carto

There is an issue about converting it to vector: https://github.com/gravitystorm/openstreetmap-carto/issues/3...

Doesn't seem like there's any current vector versions of that style, but you could make one yourself using Maputnik or similar; you'd probably want to start with OpenMapTiles and maybe even one of the pre-existing styles for OMT like OSM bright.

It would take someone designing the same style in the vector format. This [0] is the closest I've seen to a vector port of the default OSM style. Demo [1]

[0]: https://github.com/baremaps/openstreetmap-vecto

[1]: https://www.baremaps.com/assets/demo.html

In the Github issue linked by z77dj3kl I found a link to this vector port by ESRI : http://esri.maps.arcgis.com/apps/View/index.html?appid=d6b18... Closed source but very impressive