If it helps and I understood the questions correctly, the ones I have been using for sometime already in Ubuntu are these ones:
CPU SCHEDULER
Before Kernel 6.6 it was the CFS (Completely Fair Scheduler). Starting with 6.6 and Up it would be the EEVDF (Earliest Eligible Virtual Deadline First). Do note that EEVDF is still getting updates. As of 6.8, 6.9 and 6.10, it is still getting optimizations. I never found a single simple way to get the Scheduler type or a reference to it, even read this article about it https://blogs.igalia.com/changwoo/sched-ext-a-bpf-extensible-scheduler-class-part-1/
I did this dmesg | grep 'scheduler' but I only got the mq-deadline one. Did not say something like the CFS or the EEVDF.
DISK SCHEDULER
cat /sys/block/sda/queue/scheduler
The sda can be changed for your SSD, NVME, etc device, or even go Rambo by checking them all like this (The following will only look for SDx & NVMEx units):
cat /sys/block/{sd?,nvme*n1}/queue/scheduler
It would show something like this:
The scheduler inside the brackets is the one used for that block device. So for the SDA it is the mq-deadline and for the NVME cases it is not using any scheduler.