Based on the solicits since January 2021, here are the titles that are skipping during those months.

Note: I did not put the same titles skipping months twice.

JANUARY
- Black Widow
- Champions
- Captain America
- Magnificent Ms. Marvel
- Power Pack (MINI)
- Taskmasters (MINI)
- U.S Agent (MINI)

MARCH
-M.O.D.O.K Head Games (MINI)
-Marauders
-New Mutants
-Venom
-Wolverine

APRIL
-Hellions
-Strange Academy
-Union (MINI)
-X-Factor
-X-Men

MAY
-Most of Avengers related (Avengers, Avengers Mech Strike, Iron Man, Captain Marvel, Thor)
-Cable
-Excalibur
-Eternals
-Savage Avengers
-S.W.O.R.D
-X-Force
-X-Men: Legends

JUNE
-America Chavez: Made in the USA (MINI)
-Runaways
-Spider-Woman

JULY
-The Marvel
-Fantastic Four: Life Story (MINI)
-Slik (MINI)
-The Marvel

AUGUST
-Reptil (MINI)
-Shang Chi

OCTOBER
-Black Cat
-Conan The Barbarian
-Guardians of the Galaxy
- X-Corps ???

Let me know if I miss something.