How to link a subdomain in Shopify with MailerLite for social media landing pages?

[KellyTour]

Hello, I am attempting to create a social media landing page with its unique subdomain.  In the past I was able to do so using MailerLite but since their upgrade my pages no longer work.  In MailerLite I can create my subdomain, but then when I go to my Google Workspace Domain area I cannot access my DNS settings.  I have spoke to Google Workspace and Google Domains and they were unable to help me find my DNS settings.  Both told me that I need to add the subdomain through Shopify as that is my app registrar.  So yes, I can add the subdomain in Shopify, but I have no idea how to link this back to MailerLite which is my primary marketing/email system.  And then of course to check if the landing pages work on my Facebook and Instagram.  Anyone have any idea what to do?  Thanks, Kelly T

[Gidion]

Hi Kelly, 

Did you manage to finally connect the subdomain, just signed up with MailerLite and having one heck of a time figuring this out. Seems the instructions are incomplete or not accurate. 
Hope you can shed some light on the subject for us 🙂 
Thanks
Gidion

[KellyTour]

Hello, unfortunately I was unable to connect the subdomain, even after
assistance from MailerLite, and a professional that I hired. I have moved
on to Klaviyo for my email marketing, forms, etc. Best of luck! Kelly T