Delete Polygons within other polygons

[BenSaid]

Hi everyone, I have a big shapefile where some polygons are falling completely within others as shown below. These polygons are on the same layer.

I want to be able to:

1. Find all features that are within other features
2. Delete/Merge the internal polygon into the outer polygon

I imagine this is possible, but I can't get it to work. I have tried to use the Select By Location and the within/completely within relationships to select them all but have had no luck, the tool simply doesn't select them

[BrennanSmith1]

Check out the count overlapping features and remove overlap tools, they might help

[DanLee]

Try Eliminate Polygon Part with this parameter checked:

https://pro.arcgis.com/en/pro-app/latest/tool-reference/data-management/eliminate-polygon-part.htm

[DavidFrisbey]

Also,  on ArcGIS Pro: Modify Features, Divide, Clip