How do I change my Apple Podcasts name?
how to change name of podcast - support is non-existent
[Re-Titled by Moderator]
Assuming you created a feed and submitted that, usually through a third party provider, you change the title of the overall podcast according to the process they provide for inputting information.
If you created your podcast directly in Podcasts Connect there will be a field there where you originally entrered the title, and you change it there.