You've eliminated one Nicotine injection method (smoking) now you need to work on eliminating the other injection method (gum). Once you get the Nicotine out of your system it'll become easier.
When I decided to quit my 2 pack a day habit, I started slow, eliminating a couple a day every few weeks. Then I cut it to one pack a day for a couple months. Then a quarter pack a day etc... The new year came and I had 2 packs left, smoked two a day til that pack was gone and then one a day for the final pack. By that point I couldn't stand the smell anymore. Feb 2022 will be 4 years tobacco free.
Slowly cut back on the gum until the cravings leave, you can do this !!! ... Good luck