LaPorta should be the TE2 behind Kincaid in rookie drafts. How soon after just depends on league settings imho.
TEP? I could get behind him being a late 1st rookie pick (1.10-1.12) but I'd prefer him in the 2nd personally. I'm not in love with the running backs around that range though.
In non-TE premium dynasty I think I'd prefer a league with a taxi squad I could stash him in, and then I'd probably throw a dart in the mid-late 2nd. As most have mentioned, it's a tough position for 1st-3rd year guys to break out at.
In redraft he will definitely be a "sleeper", and as camps start and buzz picks up people will surely hype him as a zero-TE darling if folks are passing on the position. But honestly in redraft I'm not taking a backup tightend. I'll play week-to-week if punting the position or just stick with a Freiermuth/Njoku kind of guy.