setting up hreflang tags. Do language default tags matter?

[onlinesource]

I have four domains. A .com site which is my x-default, a .ca, a co.uk and .in store.

Right now my code is as follows.

<link rel="alternate" hreflang="en-CA" href="https://www.example.ca/page.html"/>
<link rel="alternate" hreflang="en-GB" href="https://www.example.co.uk/page.html"/>
<link rel="alternate" hreflang="x-default" href="https://www.example.com/page.html"/>
<link rel="alternate" hreflang="en-IN" href="https://www.example.in/page"/>

Should I also find a way to add hreflang="en" and setup.

<link rel="alternate" hreflang="en" href="https://www.example.com/page.html"/>

I would have two lines pointing to the same example.com domain but there would be a hreflang tag for "en".

I am asking because if Googlebot sees en-GB and en-IN isn't that en extension of "en" so wouldn't I need a default "en"?

I am running my site through hreflang tester and it says, "Default language tag not existing (en)" and I've seen some people add an additional store url and I don't know if it's a good use of resources or not necessary? BUT I think that would fix my problems?

[aakk9999]

I think your x-default should cover "en" but on the other hand there would be no harm of having "en" entry.

But before any changes, I would do some tests. For example, have you checked to see what page on which domain Google serves when you search in English from a country (and from google) that is not Canada, UK or India? For example, searching in English from South Africa or from US - what domain and what page gets served?