K-1/Stock question

My husband has a Robinhood account and he had some Energy Transfer LP Common Unit S representing limited partner interests. He had $2.59 partnership distribution on 2/19/21. The notes at the top of the paperwork say "Also shown are distributions whose tax impact will be defined by other documentation. In the case of partnership distributions, you will receive Schedule K-1 (form 1065) directly from the partnership." 

We have not received a K-1 so I an unsure of how to list this information in turbo tax. Can you please help with that? Also what do we do if we don't receive a K-1 by the tax deadline? Is this amount too small to receive a K-1?

Also he sold this stock and online his account has more information that says this dividend was re-invested. Not sure if this helps, but I am just giving all of the information I have. Thanks.