Can I really not overwrite a web layer from Pro?

Question

Hi, I'm new to ArcGIS Pro (using 3.2 Pro) and trying to understand the best workflow to update AGOL web maps through ArcGIS Pro.  Basically just testing what I can/can't do at this point.

This has been posted a few times, but with some conflicting responses.

After making a map, sharing it to AGOL, and then re-opening the web map from the portal in ArcGIS Pro, I tried adding a new shapefile to the map and then re-saving it (Share > Save Web Map > Save).  I get the error pop-up described in this post ("[web layer] already exist, please choose a different name..."), with a solution to go online, delete the old layer, and try again.  Same solution offered here.

But another thread on desktop / AGOL workflows linked to this part of the What's New in ArcGIS Pro 2.6.  The narrator can be seen adding a new layer to an existing web map and then saving it without the issue.

It would be great to be able to do what's in the 2.6 video, but I can't seem to replicate it in my later version.  Am I missing a step or is this not actually possible (anymore)?

I also found this post with a workaround, but it also says you can't make changes to symbology in the layer, but that same video above specifically says you can.

Nick_Creedon · Answer

There are ways to preserve symbology and most settings, unless you are purposefully wanting to change these things.

You can bring a Web Layer into ArcGIS Pro, right click it and go down to data and export data. There is even an Export Data tool that will do the same.

This will bring your Web Layer back as a feature class with its symbology and settings that you have saved to it last. I have had to overwrite data quite frequently, and this workflow was great. When overwriting just be mindful of schema changes. Read this page carefully: https://pro.arcgis.com/en/pro-app/latest/help/sharing/overview/overwrite-a-web-layer.htm

Nick_Creedon · Answer

Correct, I am building the maps in AGOL after the layer is already shared as a Web Layer. Yes, when creating a webmap you can add and remove layers independently.

NicholasBudros · Answer

PRO TIP: Do not use overwrite, it will replace the default settings, symbology, layer path, and all definition layer data. I find that truncating the table (aka deleting all features) and replacing all features with append, updates my data with out replacing the meat and bones.