ArcGIS Desktop (ArcMap) 10.8.2 (the latest and last version) will switch to 'Mature' support in March 2024.
That means no more software updates or patches.
ArcMap PLC - https://support.esri.com/en-us/products/arcmap/life-cycle
ArcGIS 10.6 and 10.6.1 (Desktop (ArcMap) and Enterprise) will be RETIRED on January 1, 2024.
Please refer to the Product Life Cycle on the Esri Support site.
Enterprise PLC - https://support.esri.com/en-us/products/arcgis-enterprise/life-cycle