The following article discusses roles that technology, particularly AI and drones might play
The idea of creating a robust, intelligent technology barrier as opposed to a static physical one has been floated before.
There are a few interesting points made including that an unstaffed wall by itself isn’t effective. The use of drones or other technology might better spread the effectiveness of people.
As I understand from sources such as account of walking the border, cameras and heat sensors are already used to some extent. I expect there are spots technology has its place and then also some where the region is even more remote.
One hurdle to climb is we have a president who has declared himself as a drone expert and largely dismissed this type of technology.
The president today wandered into a surprise White House press briefing already attended by border security suits to restate that he is, among other things, an expert on drone technology.
There was also a recent article from ZDNet pointing out there are already many sensors along the border and technology by itself is not a panacea.
Opinion: Technology is an attractive answer, but it's no panacea for economic and geopolitical problems at the border.
Also an article from CNET describing what might be under discussion.