ArcGIS Enterprise supports the following OGC specifications:
OGC Web Feature Service (WFS) is a dynamic feature service that follows the specifications of OGC. You can add OGC WFS layers to maps you create with Map Viewer. You can also add OGC WFS layers as items in your portal or publish a hosted WFS layer from a hosted feature layer in your portal.
OGC Web Map Service (WMS) is a dynamic map service that follows the specifications of OGC. You can add OGC WMS layers to maps you create with Map Viewer, as well as to scenes in Scene Viewer. You can also add OGC WMS maps as items in your portal.
OGC Web Map Tile Service (WMTS) is a set of cached image tiles that follows the specifications of OGC. You can add OGC WMTS layers to maps you create with Map Viewer, as well as to scenes in Scene Viewer. You can also add OGC WMTS layers as items in your portal. Additionally, WMTS is available for tile layers hosted on ArcGIS Online that are shared with the public.
More information about OGC services here: https://enterprise.arcgis.com/en/portal/latest/use/ogc.htm