Earth's Awareness (by a timeline) of the Kree/Skrull is murky
I actually had to re-watch a bit of Captain Marvel because the whole Skrull/Kree timeline on Earth and Earth's knowledge of the Kree and the Skrull is very indeterminate.
Carol Danvers and Mar Vell crash the lightspeed engine in 1989 which signals that the Kree or at least a Kree has been on Earth for a-while. Mar Vell has been able to work her way into the Project Pegasus program which had to take some covert effort to accomplish given the amount of money that was funded to the program and the design of the ship. Mar Vell could have been supplying Kree science/engineering to develop the Lightspeed but she did have plans written in Kree glyphs and were still in the archives. It would be my assumption that the Skrulls assisted Mar Vell in gaining her position within the US Government surreptitiously.
The US Government probably knew that the Kree were here and had been here for a couple of years after the fact, post 1989. A few Skrulls were hidden in Mar Vell's geo-positioned Lab above Earth and had been brought there by Mar Vell and I assume attracted by the Energy signature of the Tesseract. Mar Vell had to have a shuttle or ship that took her back and forth between her lab and Earth. That ship had to be still on Earth after Mar Vell is killed by Yon Rogg. I presume that Talos had been going back and forth between Earth and Mar Vell's lab for years after Mar Vell's death but apparently Talos and Mar Vell didn't meet while she was alive? It is all VERY confusing. 🤷♂️🤷♂️
Talos leaves with Captain Marvel but within a very short period of time (maybe less than an Earth year), they're back but Captain Marvel doesn't come back. On top of that Fury immediately starts using the Skrulls for covert operations??
Last but not least Mar Vell's body (unless it was completely disintegrated during the lightspeed engine explosion was still on Earth.
So Maria Rambeau knew about Skrulls/Kree since 1989-1995.
Monica Rambeau, ditto.
US Government, ditto.
SHIELD, ditto.
Talos had impersonated a SHIELD Agent Keller (what ever happened to the human Agent Keller that was impersonated)?