I found it easier and more professional to have my own website instead of the .substack subdomain. I was lucky to have a very cool domain name https://germantech.news
The website offers readers to see past issue and follow me on social media. additionally, it gives me more control over the appearance and allows me to be more dynamic with any changes I want to make, however, everything is still running behind the scenes with substack
I used tools like https://www.indiehackers.com/product/divjoy and https://www.indiehackers.com/product/nocodeapi to build the website in no time.