Gstreamer tsdemux support of Synchronous KLV

Question

I am using the ubuntu apt package version of gstreamer which is v1.16.3 This version tsdemux plugin does not support Synchronous KLV.

I found 5-year old PRs about this, but I don't see their edits in the tsdemux.c source for this version branch or main:

PRs: https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/434, https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/642

source: https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/blob/discontinued-for-monorepo/gst/mpegtsdemux/tsdemux.c?ref_type=heads

Is there a tsdemux plugin version available that supports Sychronous KLV (public or private)? If not, I will work on it. But, I hope it's out there somewhere.