Hardware question-- any special products for this?

[Black]

An exterior gate handle had been smashed (vandalized) last year... I replaced it but the screw holes had been mangled a bit--- got both screws to seat but now the bottom one has come loose through daily stress.Talking about the screws on the latchplate. I think I had already gone with a slightly oversized screw.... is there anything they make to help keep a screw in a hole that's stripped? Or any favorite tricks? There's no access to the other side except for taking the whole thing out.