Project reactor: Is there a non-side-effect finally like method (Not the side-effect method doFinally)

Given such an example:

Mono.create(callback -> {
    try { callback.success(someLogic()); }
    catch (Exception e) { callback.error(e); }
   })
   .doFinally((v) -> Mono.fromRunnable(() -> {
       Thread.sleep(1000); // In reality, we have a blocking I/O code here and needs to be executed on a separate thread 
   }).block())
   .block();

When I run this code, it finishes immediately without waiting for the 1000ms delay. This is because doFinally is a side effect method, so it does not execute as part of the chain. Is there a finally like method that can execute as part of the chain?

My current workaround is

Mono.create(callback -> {
    try { callback.success(someLogic()); }
    catch (Exception e) { callback.error(e); }
   })
   .then(Mono.fromRunnable(() -> {
       Thread.sleep(1000);
   }))
   .onErrorResume(e -> Mono.fromRunnable(() -> {
       Thread.sleep(1000);
   }))
   .block();

If no such method is there a better approach?