Ralf answered this on the development mailing list (which gets a copy of new issues).
Help requests like this are better handled on the roundup-users mailing list.

(see https://www.roundup-tracker.org/contact.html for links to join the mailing list. Email to the mailing list doesn't;t require joining, you can monitor from the archives (also lined on contact.html)

Ralf's answer is:

On Wed, Feb 21, 2024 at 01:51:21PM +0000, r2d2 wrote:
>
> Hello @ALL!
>
> Is there a way to modify a tracker to handle recurring / repeating tasks?
>
> For example:
> - Check oil on hydraulic press every year?
> - Check pressure tank of compressor every 3 years?

Not built-in.
The simplest way might be a cron-job that sends an email to the tracker
every k months.
And there is a REST-API where you could do more elaborate things like
automatically open a ticket whenever something happens (or whenever it's
time for something)

Hope that helps!

Kind regards,
Ralf