Yes, you can. If you have previously marked an ad as "reserved" or "rented" you can find and advertise your rentable again via the icon with the houses or via "Advertised rentables" in the menu.
All ads with the status "Reserved" can be found under the tab "Advertised" or "Reserved".
And if you press the button with three dots and select "Advertise" your ad will appear on the portal again.
For ads that have previously been marked as "rented", you need to press the "Rented" or "All" tab.
If you press the button with three dots and select "Advertise", your ad will appear on the portal again.
Please note that if the ad has been offline for more than 30 days, it will receive a new date for advertisement and customer service will need to validate and approve it again.