I would say the answer to your question is no, with an asterisk. What you're seeing is how ESRI implements new features in their web based tools and apps. The first place those features are added is AGOL, then it rolls out to the Develop Editions, and then finally it makes it to Portal. Because ESRI has chosen to slow down the roll out of new features, it will likely be 6 months from the time a feature is released in AGOL for it to also be released in Portal.
Example: at last year's UC, ESRI claimed Experience Builder would achieve functional parity with WebApp Builder by the time of the 2025 UC. If this happens, it will be the end of this year before those features roll out Portal hosted EB apps. I'm using EB as an example but this applies to the Map Viewer, Dashboard, Survey 123 etc. There was a post on the ArcGIS Blog about the change in ESRI's feature delivery philosophy a year or two ago but I can't find it.