Changing Template Location in Wagtail

Question

I'm trying to direct wagtail to use a template in a centralised location at the top of the project tree. So for example:

Project
|_ HomePage
|_ Search
|_ Mypage
|_ templates

My project re-uses templates and I'd like to give UX/UI Developers access to a single folder rather than multiple sub-folders in multiple pages.

I've tried in Mypage/models.py

class AdvisorSummaryPages(Page):
    
    intro = models.CharField(max_length=250, blank=True, null=True)
    
    content_panels = Page.content_panels + [
     FieldPanel('intro'),
     InlinePanel('carousell', heading="Carousell Images")   
    ]
    
    template = "advisors.html"

With the following template setting in Project/Project/settings/base.py

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            os.path.join(BASE_DIR, 'templates'),
        ],

With no luck. I can't seem to find any solution on SO or through the documentation or Google that might work. There is a solution presented here using separate model admins but that doesn't work for me. How might I specify the location of the template differently to a subdirectory of templates in the MyPage App?

Thanks