301 Site migration: How long will it take my new site to rank instead of the new one?

Hey guys, i changed my domain name and therefore conducted a 301-redirect for all urls on my old domain pointing to the new domain. In addition google search console was informed about the site change. I have also changed the most important backlinks to change the anchors+link to target my new site.

How long will it take till my old rankings transfer to my new site?