How to get consistent formatting in logs?

[Densaugeo]

I'm trying to write a FastAPI web service. Running with the FastAPI command doesn't work, because it doesn't seem to support HTTPS at all, so I am running my FastAPI app with a uvicorn command:

venv-pyuthon3.12/bin/python -m uvicorn app-fastapi:app \
	--host 0.0.0.0 --port 443 \
	--ssl-keyfile privkey.pem \
	--ssl-certfile fullchain.pem

This works great, and even prints a very nice access log with color-coding that makes it very easy to read (though the lack of timestamps is unfortunate):

However, when I create a SystemD unit file and run the exact same command with SystemD, I get logs like this:

Now there's timestamps! But the colors are gone, it's not as easy to read.

While looking into this issue I tried logging into my PC over SSH and running the same command at the terminal, and got a third format:

When the exact same command is run in an SSH terminal instead of in-person, most of the color coding is preserved but some is lost. Weird.

While debugging that, I tried redirecting the logs to a text file to compare them with a hex editor...but this didn't work at all! When run this way, the color coding disappears completely, along with some of the log lines:

Why are there so many different log formats? Is there a way to get the same log when running under SystemD and also running at the terminal for testing? Preferably, I'd like logs with colors and timestamps whenever I run it.