There is some form of crafting equipment, in a unique way this game implements it.
Firstly, crafting in this case means crafting the stats of the gear and not the physical gear itself.
There are magic kilocrystal that improves the grade of your gear.
There is going to be an item randomizer who can add 2 more stats to your item. This means over perfect stats on your item.
Judging from the possible NPCs available, the synthsizing tech, and how things look, it may be possible to implement gear crafting (making physical weapon from materials) of some form. I mean the mechanics and methods are there but whether the developers decides to implement it or not, we just have to wait, but no, for now gear crafting is not available.
Lvl20 is considered low level, just buy any rare grade weapon u like in the consignment shop (the more + the better). Beyond lvl30 you'll be entering mid game and the most grind period of the game. Beyond that there is no further game content.
I personally think that crafting will be available. Think about it like this, they can sell item 1, item 2, item 3, item 4 and stabilizing catalyst, and safeguard crafting, and replicubes that gives materials required for crafting items, all inside the AP shop just for the sake of crafting something legedary or epic or whatsoever. Crafting is a very lucrative business for the game hosts.