It’s very unfortunate that these glyphs are not available via OT features or font-variant in CSS. I assume the cockpit software uses glyphs directly instead of using OpenType.
There are two open tickets about it, the second is almost four years old, maybe someone here who is familiar with the tooling could contribute?
I don't think any amount of tooling knowledge could facilitate a contribution at this point. It's a dead project. The best anyone could do is apply the steps in issue #24 to a fork and start promoting it.
The only user who's demonstrated merge rights on the repo is the repo's Eclipse Foundation project lead, Laurent Spaggiari: https://projects.eclipse.org/content/laurent-spaggiari-proje...
Who's the only listed contributor on the repo: https://github.com/polarsys/b612/blob/master/CONTRIBUTORS.tx...
And who's been publicly inactive on GitHub since the repo's last merge in March 2019: https://github.com/LaurentSpaggiari?tab=overview&from=2019-0...
I don't think any amount of tooling knowledge could facilitate a contribution at this point. It's a dead project. The best anyone could do is apply the steps in issue #24 to a fork and start promoting it.