Transcription of list items - how to punctuate two-word sentences

How would you punctuate two-word sentences that begin with a sequence word?

[Sequence word] [noun].

I see this often when transcribing PowerPoint presentations, where I do not change the word content and the speaker is reading off of a list. I am trying to decide whether it flows better to use commas, colons, or even em-dashes or semi-colons. I essentially would like to indicate the implication of "is" between these two words, without using punctuation that is overly distracting.

1. [Sequence word], [noun].
2. [Sequence word]: [noun].
3. [Sequence word]—[noun].
4. [Sequence word]; [noun].

Here are some examples of what I see:

Firstly, appearance. The appearance of your app will be one of
your most important areas of focus. […]

Secondly, setup. The metaphor I normally use with this is designing a
table. […]

Finally, data storage. Using SQL or the another database. As with
all software development, databases are needed for storage and
recall of user information. […]

Thanks in advance for any input. I searched for a while using terms like "two-word sentence" and "sequence words", etc, but didn’t find anything relevant, so was probably looking with the wrong keywords or am perhaps approaching this from the wrong angle.

Edit: researching this more, it seems the best search terms for this may be "punctuation in nominal sentences", so I’ll update this post if I find anything useful.