How to have dynamically changing in-text {{title}}

What I’m trying to do

I would like to have the text {{title}} within the markdown file that changes dynamically if the title is changed. Currently, the auto template trigger plugin interferes with how the text {{title}} appears. If I haven’t already named the file, the {{title}} will generate with the word ‘untitled.’ Also, if I change the name of the file, it won’t change automatically with the text.

I’m wondering if anyone has any suggestion to fix this, other than using an internal link to itself?

That’s not how it’s done.
You create templates and you can add ‘title’ property and e.g. H1 with the same title variable value. (Where the value is usually basename of file.)

Plus, you can set in settings: Appeareance > Show inline title.
But I guess this is not what you want: you want the title value phyically present in the md file.