What issues are you having? There is a new Lombok version that is compatible with JDK 16, but even with the previous one you can use Lombok with that combo if you add the appropriate flags to the compiler process. I migrated 21 services precisely to Java 16 and Spring Boot 2.4.4 some weeks ago and that's pretty much what I had to do regarding Lombok.
Note that I could not get delombok to work because you cannot pass arguments to the JVM in that plugin. I have yet to try with the latest Lombok release for that case, but it was an optional step in my case.
D.