It is on the Roadmap but as Oskar points at in his reply we miss the most important part of this which is the need for structured data.
The working group for the “next ad format” had the idea to provide a free text field for structured keywords in ads where “remote work” would be an example. This is supposed to give a much a higher accuracy for where to both find and put certain information that doesn’t fit squarely in other fields.
It has also been discussed if remote could actually be treated as a location.
The main idea of the new format is to keep it simple to start with as its much harder to remove fields than adding them.
No matter the exact solution the most important part to make these jobs easy to find and filter is how it looks in the many interfaces used by employers.
As to when we will see something live id rather not guess as there are multiple groups involved with a lot on their hands and the job involves a new ad format which is a very big change. But I believe all of them agrees with you about the need for this.