I used gdal2tiles to convert a bunch of GeoTIFFs to a tile layers , merged them and uploaded them to a webserver. The resultant URL looks like https://www.domain.tld/path/to/{z}/{x}/{z}.png , which I can use in LeafletJS.
My question is... is it possible to load this tile layer in ArcGIS? In my Google searches I came across https://wmts.maptiler.com/ which seems like it converts tile layers like what I described to a WMTS. I took the resultant URL and went to Insert -> Connections -> Server -> New WMTS Server and Servers -> WMTSGate on wmts.mptiler.com.wmts -> WMTSGate -> wwwdomaintld and was able to add that to the Contents panel but that then zoomed the map view out so much that the entire Earth showed up.
Any ideas?