Minimalist baker kimchi

Hi gang, we have kimchi in our cafe from a great supplier/ it's spicy and only uses apples for fermentation. Because of delivery issues, we have been testing brings it in house. It must be vegan cos our customers really love her kimchi and it makes it easier for dietary requirements

First batch- used British cabbage and didn't ferment

Second batch- https://minimalistbaker.com/easy-vegan-kimchi/#wprm-recipe-container-35343

Followed this recipe, made Friday and the texture is better but flavour is so bland, I can't taste any sour or spiciness.

Please help!! We are broke and delivery costs of a ten kg of kimchi is just out of hand!