Due to covid there is a whole load of home training stuff from reputable coaches and choosing something by them is a good option. But this is what I would do with your equipment. I have not added the leg work, thats not my thing lol. So the 4th day could be legs or you could split it up like you currently do.
Workout 1 chest focused
Bench (as you are doing now)
Landmine chest press - 3 sets 15-20 reps
Dip or fly variation - 2 sets 8-12
Close hand press up- 3 sets to failure
workout 2 back focus
Deadlift (as you are doing)
Pull up - 40 rep total as many sets as it takes)
Land mine t bar row- 3 sets 8-12 reps
Meadows row- 2 sets 10-15 reps
workout 3 shoulder focus
Overhead press - (as you are doing)
Shoulder tri set (all done in a row with no rest)
Side laterals - db upright row - db shoulder press
3 tri sets 8-12 each exercise
Curls - 3 sets to failure
workout 4
Legs or repeat workout 1
Use exercise 1 to track progress, aim to progress on weight or reps. The other exercises work on quality of reps and creating maximum tension. Still look to progress but not at the expense of quality or tension. Nice smooth reps with controlled lowering.