Missing shortcuts from new Lightroom

I've been using Lightroom Classic for many years, but I got the idea it might be nice to sync up and use the new Lightroom on my laptop. My issue is I can't figure out some differences I constantly use on Lightroom classic. Is there really not a keyboard shortcut for adjusting sliders? The plus and minus keys don't seem to work unless I'm missing something. Also, if I select multiple images and try to apply an adjustment, there seems to be no way to auto-sync the settings. I'm basically using these two features constantly every day, I don't understand how they could be missing from the new Lightroom, so I'm thinking I'm missing something. Thanks for the help.