Due to the increase of handling products, adding a product number is being managed.
Due to an increase in products, it's difficult to keep up with products based on just their names. Therefore I would like to manage adding product numbers to clear the ambiguity.
ご質問ありがとうございます。
「取扱商品が増えたから商品番号をつけて管理する」は英語で「Due to the increase of handling products, adding a product number is being managed.」と言えます。
しかし、「商品が増えてきて、商品名だけではやり取りがしにくいです。商品番号をつけて管理したいです」の場合、英文は少し変わります。英訳すれば、下記の英文の通りになります。
「Due to an increase in products, it's difficult to keep up with products based on just their names. Therefore I would like to manage adding product numbers to clear the ambiguity.」
ご参考になれば幸いです。