I recently started using the Templater plugin.
On my daily notes, I have a section at the top which links to the days before and after the current daily note. It looks something like this:
<< [[Yesterday]] | Today | [[Tomorrow]] >>
To automatically link to the previous daily note, you can make use of the built-in function: {{tp_yesterday}}, which returns the previous day’s date formatted as: YYYY-MM-DD.
Now, depending on how you choose to name your daily notes, you can create a link to them using this function.
I name my daily notes as "YYYY-MM-DD DN", so to link to them, I have the following line in my daily note template:
[[{{tp_yesterday}} DN|Yesterday]] which Templater returns as [[2020-12-17 DN|Yesterday]]
To do the same thing for tomorrow’s note:
[[{{tp_tomorrow}} DN]]
I hope this helps 