Richard Palethorpe

Provides a block which embeds a <a href="https://dobu.uk" rel="nofollow ugc">DoBu.uk availability calendar and enquiry form</a> 
for a given nick name.
See the above link for a demonstration.

DoBu.uk Availability

Embed DoBu.uk availability and booking calendars

Betterware Software

paulfelge

Rentware Widgets for Elementor adds a dedicated Rentware widget to the Elementor editor, letting you embed rental checkout and availability calendar widgets directly on any page — no coding required.
What is Rentware? 
Rentware is a rental management SaaS platform that helps businesses manage inventory, bookings, and customer relationships. It provides embeddable widgets for checkout and availability calendars that integrate directly into any website.
Features:
<ul>
<li>Drag-and-drop Rentware widget in the Elementor panel</li>
<li>Supports Checkout Widget and Availability Calendar</li>
<li>Global access token setting shared with the Rentware Shortcodes plugin</li>
<li>Per-widget token override for multi-account setups</li>
<li>Compatible with Elementor 4.0 and the new Atomic editor</li>
</ul>

Rentware Widgets for Elementor

Integrate Rentware rental widgets into your WordPress website using the Elementor Page Builder.

DoBu.uk Availability vs Rentware Widgets for Elementor