Probably best to see if it can be patched from the back of the panels.
My truck's ('05) radio bezel is cracking in two-three places at the top, where there's the least area. Drizzling SuperGlue in the crack didn't bond-in fact, it made a white discoloration in the margins of the crack. It's not noticeable so I don't care.
I used JB Weld on the back of the bezel to keep the cracks from spreading. With a big area or in a curved portion, I would probably put a skim coat of JB Weld or similar and before it dried embed some fiberglass mesh tape like what's used for finishing Hardiboard/Durock panel joints.
I'd let that dry, and depending upon the locaion/size of the area repeat the process with cross-lamination of the fiberglass tape. IDK if (say) epoxies would damage the plastic, but that might be better than JB Weld.
