I feel like I had an app on my switch that would update my sig patches automatically, but I cannot remember what it was called. Could someone please refresh my memory?
You can add sigpatches to AIO updater as a custom download option.
I'm not sure I am permitted to post a link to a guide here, so here is a copy-pasted instructions:
Extract aio-switch-updater.zip to your SD card.
Enter All In One Switch Updater.
Scroll down to Custom downloads and select the second Add a custom link button.
Add the following to the Title and Linkfields:
Title: Signature Patches
URL: Insert a url for sigpatches (should end with ".zip")
Once again I fell down the martial arts rabbit hole and am plumbing the murky depths of the internet's various martial arts and fighting crafts echo chambers.
If you're not actively involved and only get up to speed every few years or so, you can see the tide of public opinion flapping worse than my dong while I'm skipping naked down a hallway.