I also wish to know more in details. Unfortunately, all I find here about training is out date, not much better using Google. Best and newest I could find when I started was these drills from September 2021 and if anyone has updates to this(if there was any), please share. Thank you.
GK
Attacking Drills: Shooting Technique, Wing Play, 1-On-1 Finishing
Defensive Drills: Goalkeeper Training, Hold The Line,
Physical Drills: Warm Up, Stretch, Sprint, Carioca With Ladders, Long Run, Gym
DC
Attacking Drills: NA
Defensive Drills: Press The Play, Piggy In The Middle, Stop The Attacker, Defending Crosses, Video Analysis, Hold The Line
Physical Drills: Warm Up, Stretch, Gym, Shuttle Runs, Hurdle Jumps
DL/DR
Attacking Drills: NA
Defensive Drills: Press The Play, Piggy In The Middle, Stop The Attacker, Defending Crosses, Video Analysis, Hold The Line
Physical Drills: Warm Up, Stretch, Sprint, Carioca With Ladders, Long Run, Shuttle Runs, Hurdle Jumps
DMC
Attacking Drills: Skill Drill
Defensive Drills: Press The Play, Piggy In The Middle, Use Your Head, Stop The Attacker, Defending Crosses, Video Analysis, Hold The Line
Physical Drills: Warm Up, Stretch, Gym, Shuttle Runs, Hurdle Jumps
MC
Attacking Drills: Pass Go & Shoot, Skill Drill, Slalom Dribble, 1-On-1 Finishing
Defensive Drills: Press The Play, Piggy In The Middle, Use Your Head, Stop The Attacker, Video Analysis, Hold The Line
Physical Drills: Stretch, Sprint, Long Run, Shuttle Runs, Hurdle Jumps
ML/MR
Attacking Drills: Pass Go & Shoot, Fast Counter-Attack, Skill Drill, Slalom Dribble,
Defensive Drills: Piggy In The Middle, Use Your Head, Video Analysis
Physical Drills: Stretch, Sprint, Long Run
AMC
Attacking Drills: Pass Go & Shoot, Fast Counter-Attack, Skill Drill, Shooting Technique, Slalom Dribble, Wing Play, 1-On-1 Finishing
Defensive Drills: Use Your Head
Physical Drills: Warm-Up, Sprint, Long Run
AML/AMR
Attacking Drills: Pass Go & Shoot, Fast Counter-Attack, Skill Drill, Shooting Technique, Slalom Dribble, Wing Play,
Defensive Drills: Use Your Head,
Physical Drills: Stretch, Sprint, Long Run
ST
Attacking Drills: Pass Go & Shoot, Fast Counter-Attack, Skill Drill, Shooting Technique, Slalom Dribble, Wing Play,
Defensive Drills: Use Your Head, Video Analysis,
Physical Drills: Stretch, Shuttle Run.
P.S. "Hold The Line" is "On Line Of Defense", I suppose. It seems like name changed since then or maybe more than just names, cannot say for sure cuz I don't have it unlocked yet. Also bold drills are mentioned as drills which gives 100% output for that position.