You can’t print from the WIndows version so you will need to export to Gimp or other application. In that case you will want to export in a way that makes the use of that application the most flexible.
In DT as to your first comments about the histogram its likely expected and as you say maybe more so if you are pushing gamut… For the raw you are coming in to it in the camera colorspace and making it to the large gamut working space and then finally after editing you make the jpg using the settings in the output profile to map your jpg. If you take that jpg back in to DT and through the wide gamut working profile then you are trying to unwind that and its not completely reversible so it will be a bit different… You can see this is you move the working profile between srgb and the default rec2020 when you reload the jpg… using the waveform you can see some small changes… likely setting your histogram profile to srgb for the raw edit and comparing that to the loaded jpg with that same setting and the working profile also at srgb should be a fairly close match as there isn’t that extra colorspace conversion… but I think its pretty minimal in most cases and making sure that you have a color managed viewer that is set properly to view your exports is more important. I see you use windows photo viewer… I’m still not at the point I trust it and microsoft is always tweaking with color management…