What I have seen with Chase, is that for business accounts, you need to talk to a business banker. Not all branches have those and even if they have one in your branch, you may have talked to a a regular banker who is not approved to open those. So they have to forward all the documentation to the proper business banker and you may not be one of their priority. For one of my business account I had to go to a different branch as the first one did not want to open the account.
Also do not try to open these online, you really need to go in person to avoid all the red tape. Bring your operating agreement (showing you are the member), SS4 letter with EIN from the IRS, proof of address and your own ID.
Last, try to locate the promo code that they had for a $100~$350 reward for opening a new business account. I don't know if they still have it or not, but ask your banker if he can find one for you.
Chase business accounts are great as you can easily get a Chase Ink business credit card that will start building a credit history for your business. This card is not reported on your personal credit report. You can do easy transfer from one account to another, you can also use Zelle for business.
However, these accounts have a high minimum balance if you want to avoid fee. Some local credit union may have lower or no minimum balance and no fee.