It's been like it since install.

Current Version:

Sweet Home 3D ®
Version 6.4.2 Java version 11.0.11 - 64bit - 0.1 / 7.8 GB
Java 3D version 1.5.2
PDF print provided by iText
SVG export provided by FreeHEP
SVG path compilation provided by Batik
Photo rendering provided by SunFlow

Attempted on Ubuntu 20.04 and Ubuntu 21.04.