ArcGIS Pro 2.5
The new attribute find tool as acting strangely for me: I have a series of 4 tables, each derived from the same source data using the same procedures, and same fields. However in only one of the four the Find and Replace choice appears in the context menu from the table menu. I'm working from home and this laptop won't capture a context menu or I'd provide an image; but it's not there 3 out of four tables.
I have five feature classes added to the same map and all of them have the Find and Replace functionality in the table menu.
That should just about do it....