Raspberry Pi 4 and audio via HDMI

I currently have a RPi4 with LE 9.2.5 installed. At the moment I only use the music library. I have the HiFiBerry digi+ attachment providing audio to an old Yamaha AVR (no HDMI inputs/outputs), so may consider getting a new AVR. I would be grateful if forum members could answer / give some thought to the following for me.

1. Is my pi capable of sending all the common audio sample rates through the HDMI ports 44.1 kHz; 48; 88.2; 96; 176.4; 192 kHz? I know Kodi can resample but I would prefer a bit-perfect set up if this is achievable.

2. Because of the ease and availability of movie streaming services I have never investigated how easy (or how difficult) it is to rip my own DVD, HD DVD, or Blu-Ray discs. It is rare for me to play discs now because it is so much easier and quicker to just click a few buttons on my Amazon Fire TV / Roku devices. I only have pretty basic PC computing power and it was basic when it was new, it is now 5 years old, but it does include a DVD drive. I have a collection of about 400 discs, which is split approx. 250 DVD; 80 HD DVD; and 70 Blu-ray. I am retired, so have time to do this, but the enjoyment and perceived cost/benefit ratio of undertaking projects of this kind seems to diminish with age. I would welcome opinions on this potential project.

Kind regards from Jeff

Thanks for your thoughts blueribb. Like you I ripped my CDs to FLAC 7 years ago. I converted some of the FLAC collection to mp3 for playing on my 'phone and from time to time I convert flac files to mp3 as and when required. I think it is a good idea to rip to a lossless format like flac initially as if you rip directly to mp3 there is no getting back the discarded data even if our older ears cannot hear a difference. The amount of additional storage needed for FLAC (over mp3) was not at all cost prohibitive even 7 years ago. The jury's still out on whether I undertake a project to rip my movie discs, but thanks again for your thoughts.