The Pixel 3 and the Pixel 3a both support eSIM.
(The Pixel 2 sort of did but only for Google Fi.)
The Pixel 3 briefly supported DSDS (pSIM+ eSIM) in a beta but it was removed before general release.
Pixel 3a was the first Pixel to officially support DSDS.
"The open source part of iVentoy" is on GitHub. Perhaps it's not completely open?
The Pixel 3 and the Pixel 3a both support eSIM.
(The Pixel 2 sort of did but only for Google Fi.)
The Pixel 3 briefly supported DSDS (pSIM+ eSIM) in a beta but it was removed before general release.
Pixel 3a was the first Pixel to officially support DSDS.