Hello there @Bleu0330! Welcome to the forums
I'm sorry to hear that your "Completionist All the Way" trophy hasn't unlocked. Have you checked all of the regions to ensure that you can completed all of the mysteries and collected all of the wealth/artifacts? You'll need to fully complete Norway, England, Vinland, Asgard and Jotunheim to trigger the trophy.
If you have completed all of the regions and the trophy still hasn't triggered, please can you send us some images/videos that show you have successfully completed each region, as well as an image that shows the trophy is still locked? Due to the size of England, you may find it easier to capture a video showing that you've completed each region within England.
I'd recommend uploading any images/videos to a sharing platform, such as Google Drive or One Drive, as this will allow you to post a shareable link within this thread for us to take a closer look at.
Thanks!