Control+Backspace is a common shortcut for deleting the previous 'word' (the previous block of text to some form of white space).

It's very common in IDE's, even FireFox supports it if you type words in the address bar, press Control Backspace and the behavior happens there.

Asking ChatGPT about the origins of this, it points to Control+W originating from Unix Terminals, and how it's been adopted by most IDE's as Control+Backspace.

Microsoft has very poor support for it in their tools, and I use MS products for the bulk of my work.

Moving to non-Microsoft products like Google Sheets, and viola, Control+Backspace works.

Even muscle memory stuff like Control+Shift and left arrow to select previous words; also not supported by Excel, but it is by Google Sheets and IDE's.