Ive always been in the "do as much volume as you can recover from" camp. I dont do a bunch of different movements per bodypart though, over the years Ive found my bread n butter moves for each one, and go 3-4 sets to absolute failure on each. My split for the last 3 years has been Su/M/W/F, pull/push/legs/full upper, but I deadlift on pull day so legs get a little love there. And full upper day leans towards lagging bodypart (chest right now)

Frequency and volume are both very individual. I tried a PPLPPL in the past and it just doesnt work as well for me as my modified bro split.

To the point of your question, find a split you enjoy most and get good results from, then experiment with pushing the volume. And keep in mind, you may have some body parts that can handle a shit ton, and some maybe only a few sets. To me, junk volume is the sets not taken to or near failure. Even near the end of a workout, running on fumes, gotta hit that 9-10 rir

Last thing ill add, and this isnt directed at you just in general, most people wont overtrain or overtax their cns. Most lifters dont push as hard as they think they do. LIke @Papa-pwn said, if it happens you will know it

You will know when you’re doing too much.

Overtraining is not subtle and it will smack you in the face. Ideally, you push as close to that as possible without reaching it.

But the thing is, everyone is different. So while I wouldn’t wish that feeling on anyone, I do sort of recommend you test your limits just to see where that threshold is. That’s really the only way to know just how far you can actually take it.

For me, I was doing daily training, with 20-25 sets per session all taken to complete failure. Split was push-legs-pull-legs-arms-legs-repeat, no days off for months on end.

Eventually everything sort of grounded to a halt. I couldn’t sleep, my head was pounding all day, I was getting weaker. Major CNS burnout combined with a large influx of minor pulls and sprains from my foot to my adductor to my lat to my pec to my forearm.

I took two weeks to deload - halfing my reps and my weights on everything - and I was good as new.

Now I take a programmed cardio only day once per week, and my volume is 15–20 sets per session. That last growth period still culminated in 10lbs of stage weight, so I’m hoping a more intelligent approach that doesn’t force me to take a deload will result in just as much, if not more, this offseason.

I know you also do jiu-jitsu, and that is a big missing component here. It's going to add a lot of stress on your joints, tendons, and ligaments. I have a very similar routine to yours, Along with jujutsu 5 to 6 days a week, My right shoulder and both elbows are both hurting. I think your routine is great, but you'll probably need an extra 750 cal and some extra protein On days you train twice.

If your aren’t pushing yourself to failure and doing multiple exercises I think that’s what I’d consider junk volume. You always see it in the gym. I’ve had pretty good results with fewer lifts with maximum effort. Just my opinion

Volume fan. And I don't think that throwing in some extras is hurting anything every now and again. If your recovering fine, should be good.

"Am I hurting my progress and being wasteful throwing in some extra sets here and there?"

I think it goes off how ya feel. My routine is day 1 push, day 2 pull, day 3 legs.

1) if i can, and feel good from revocery, Ill do 2 full rotations then take a rest day then repeat
2) if im feeling not my best, Ill take a rest day between rotation 1 and 2
3) if im really feeling shitty and know my body needs a break, Ill only lift EOD.

Usually Ill do #1 two times a month (2 weeks), #2 once a month, and #3 the last week of the month to give my body some recovery time.

With all that said, my sleep is absolute shit. Just hopped back on my cpap machine so hopefully I can get used to that again and get better rest at night.