WMS - is it possible to change the coordinate system?

[nadja_swiss_parks]

Hi everyone

We work with WMS services and whenever possible with EPSG 2056. We know it is possible to integrate the WMS layers (if offered accordingly) as EPSG 2056 in ArcMap. We also know that it is not (yet) possible to change the coordinate system of a WMS layer in ArcGIS Pro. We're wondering: is it possible to change the coordinate system of a WMS layer in ArcGIS Online if it would be provided by the WMS provider?
I attach the corresponding links below.

thank you and best wishes

WMS-URL: https://wms.geo.admin.ch/?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetCapabilities

ArcMap: https://desktop.arcgis.com/en/arcmap/latest/map/web-maps-and-services/setting-the-coordinate-system-... >> changing to a server-supported coordinate system

ArcGIS Pro: https://pro.arcgis.com/en/pro-app/latest/help/data/services/use-wms-services.htm >> WMS service layers and coordinate systems

ArcGIS Online: ?

[Waffle_House]

I don't think it is possible to do any coordinate system conversion in ArcGIS Online. Can only project on the fly when it is displayed on the map to whatever coordinate system the basemap is in