I am about to install a Revtec 1.5“ leveling Kit on my 2019 TRD ORP. Does this have any effect on my warranty? Thank you

Yes and no. If you have an issue that is caused by the spacer kit, then they won't honor it. But if it is unrelated, then you are fine.

There is no such thing as a "voided warranty". They can't do that. However, they obviously do not have to cover any parts that you added, or any parts that you directly modified, or anything related that broke as a result of a mod. So if you upgrade suspension, they can deny you for a ball joint failure, but they can't deny your stereo not working.

Actually, manufacturers can, and have, voided the entire warranty on cars - Mitsu did it with cars that they saw at the track, a salvage title will void the warranty as will odometer fraud or when a car is so heavily modded that nearly each system is affected by a mod.

But what we are talking about is a dealer denying warranty coverage for a failure that they believe was caused by a mod or that the mod contributed to the failure.

Accordingly, with any mod, you need to ask yourself "what could the dealer blame on this mod?" and then be pleasantly surprised if those failures are covered by warranty.

On the VW forum years ago, we played "Six degrees of Kevin Bacon" connecting any mod to any failure. One of my favorites was aftermarket tire valve stem caps causing an ECU failure.

That said, unless you're an ass or have ridiculous demands, most dealers are reasonable and will cover legitimate failures - but you have to be mentally and fiscally prepared to pay for anything that your mod breaks (even remotely).

Had this kit on my T4R a few years ago when it was under factory warranty. Toyota didn't cover the rear shocks because they were replaced with Revtek ones. Everything else was fine. The added spacers on top of the struts didn't change anything as far as Toyota was concerned per the factory warranty. You will be fine. Oh, mine was the 3"/2' lift.