There are passive ways too on AliExpress like IR reflective sprays, coatings and films, but in my country, and I suspect in most of Europe, any intentional tampering with the legibility of your license plate is illegal and can land you hefty fines or even jail if caught.
They also don't help much any more. Not with cameras that do color, infrared, 4K or 8K video, high dynamic range, and vehicle make and model recognition.[1][2]
In the first video, note the checkbox in the analysis program for displaying vehicles with "strange plates" which were in range for reading but not read. Trying to obscure a plate draws automated attention.
Big Brother has AI, too.
[1] https://www.youtube.com/watch?v=-qJsvBW05RI
[2] https://www.youtube.com/watch?v=5U2LWuBFIR0
Flock will use things like bumper stickers, tow hitches, roof racks, body panel color differences, wheels/rims, and window tints to add to vehicle identification metadata".