Google's John Mueller said on Twitter some time ago that the trailing slash after the domain name is an implied canonical. He said "The trailing slash after a domain name is always there, even if it's not shown." "It's always implied for canonicalization," he added.
Here are the tweets about this:
The trailing slash after a domain name is always there, even if it's not shown. It's always implied for canonicalization.
— 🍌 John 🍌 (@JohnMu) December 6, 2018
So if you see https://www.seroundtable.com it really means https://www.seroundtable.com/
Forum discussion at Twitter.