@Erak1n
Hi there.
I understand what you’re trying to say. However wing play is more commonly used with 4-3-3 B or A formations. LM and RM are usually used in formations with 5 midfielders (like 4-5-1). This formation is not used as much, which is the reason for these players appearing less on the transfer list. Usually this formation is used when managing international teams, so you can find these players there.
You should keep an eye out on the transfer list for these players, but the best solution is to use your scout to find these players, and choose the LM or RM option when choosing the specific position. You will get the best options.
JAY ZO