What to do into matchups where you can't push the wave because you would get all-ined

I don't mean champions that have waveclear, I mean champions where if you try to push/oneshot the wave you would get chunked or they all in you.

Champs like irelia for example, just played a game against her, I solokill her early but after first or second base I can't kill her again cuz of vamp scepter and if i try to oneshot the wave she chunks half my hp and I can't roam anymore.

Another one is malphite for example, after a certain point he stands on the wave and if I try to oneshot it he again chunks me.

I struggle vs champions like these not cause of the 1v1 but because I can never roam, like in the irelia game both sidelanes got gapped and I wanted an opportunity to roam and get the shutdowns but could never get tempo to do so, I literally spent 15 mins just catching waves under tower.