They stick with this double-sided tape ... It is important that the manufacturer is of a recognized brand, because there are many manufacturers, but only a few make good products ... And in the case of the LED strips they should not take off because having to remove the LCD panel again (with how delicate it is) to paste them again is a show.
https://www.shoptronica.com/cintas-tecnicas-adhesivas/1784-cinta-adhesiva-doble-cara-3m-9080-para-tiras-led-o-moviles-8944748425492.html
I use this one, and it's going well ;-) ... the one with a width of 20mm