The ORA importer/exporter is not in the package anymore

System information:
Ubuntu 20.04 LTS - 32 GB RAM - Ryzen 7 2700
package gimp-plugin-registry=9.20180625ubuntu2 from the universe repository
it should have the OpenRaster (.ORA files from MyPaint) importer/exporter:

[19:37] [9019] [patola@risadinha patola]% apt-cache show gimp-plugin-registry | grep -A 3 -B 3 -i openraster
   * lqr (0.7.1): Liquid Rescale
     Content-aware rescaling. Keeps the features of the image while
     rescaling along a single direction.
   * openraster (20110529-1d32622): OpenRaster load/save handler
     OpenRaster is an effort by the Create project[1] to offer a standardized
     and open interchange format for raster-based applications. This plugin
     allows one to load and save files in the OpenRaster format.
   * planet-render (1-2): Planet Render
     Creates a planet. Color, size and sun orientation
     can be set.

But it doesn't, directory /usr/lib/gimp/2.0/plug-ins doesn't have it:
[19:37] [9021] [patola@risadinha patola]% dpkg -L gimp-plugin-registry | grep /usr/lib/gimp/2.0/plug-ins
/usr/lib/gimp/2.0/plug-ins
/usr/lib/gimp/2.0/plug-ins/dbp
/usr/lib/gimp/2.0/plug-ins/fix-ca
/usr/lib/gimp/2.0/plug-ins/gimp-lqr-plugin
/usr/lib/gimp/2.0/plug-ins/gimpmask
/usr/lib/gimp/2.0/plug-ins/plug_in_lqr_iter
/usr/lib/gimp/2.0/plug-ins/plugin-heal-selection.py
/usr/lib/gimp/2.0/plug-ins/plugin-heal-transparency.py
/usr/lib/gimp/2.0/plug-ins/plugin-map-style.py
/usr/lib/gimp/2.0/plug-ins/plugin-render-texture.py
/usr/lib/gimp/2.0/plug-ins/plugin-resynth-enlarge.py
/usr/lib/gimp/2.0/plug-ins/plugin-resynth-fill-pattern.py
/usr/lib/gimp/2.0/plug-ins/plugin-resynth-sharpen.py
/usr/lib/gimp/2.0/plug-ins/plugin-uncrop.py
/usr/lib/gimp/2.0/plug-ins/resynthesizer
/usr/lib/gimp/2.0/plug-ins/resynthesizer_gui
/usr/lib/gimp/2.0/plug-ins/separate
/usr/lib/gimp/2.0/plug-ins/separate_import
/usr/lib/gimp/2.0/plug-ins/streak
/usr/lib/gimp/2.0/plug-ins/wavelet-denoise
/usr/lib/gimp/2.0/plug-ins/webexport

The save version of gimp 2.10.18-1 in snap format has this plugin working correctly.
Of course, the openraster importer/export is also not in gimp=2.10.18-1 deb.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gimp-plugin-registry 9.20180625ubuntu2
Uname: Linux 5.6.0-15.2-liquorix-amd64 x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.2
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ICEWM
Date: Thu Jun 4 19:31:48 2020
InstallationDate: Installed on 2018-01-08 (878 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
SourcePackage: gimp-plugin-registry
UpgradeStatus: Upgraded to focal on 2020-05-01 (34 days ago)
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=s
mtime.conffile..etc.default.apport: 2018-12-08T09:39:42.468905