can i get feedback on my workout routine

day 1
4x6 back squats
4x6 bench press
4x6 bent over barbell row
2x12 barbell curl
2x12 pullups

day 3
4x6 back squat
4x6 overhead press
1x6 deadlift
2x12 behind the neck press
2x12 pushups

day 5 is a repeat of day 1 but the accessories are front squats and lunges

I can only do barbell exercises.

I like it. Hits all muscle groups. But:
What’s your RIR?
What’s your planned progression?
No need for direct tricep work?
Light on direct bicep work- but some don’t require bicep/tricep direct work… You may be one.
Squatting 16 sets per week (including front squat), especially if RIR <2, would be impossible (for me) to recover from.

It’ll definitely work for a while

After a period of time you may find progress stalls. At that point I’d consider varying rep schemes slightly, and making sure you’ve standardised how you’re progressing