Have had a former female coworker report a similar experience with IBM more recently than yours, pretty much search and replace "native american" with "female engineer". It was her first career out of college, and she just was not assigned very much duties in her actual team, and her management were far more interested in her DEI work than her engineering work. After a year of going "well maybe they just think I'm too junior for interesting work", she left for the company where we worked together.