No, unfortunately you'll need a separate K-1 for each passthrough entity in addition to your "main" partnership. But, if the "main" partnership only has only one kind of activity (ordinary income (loss) or rental income (loss) but not both), and each of the passthrough entities only have one kind of activity (ordinary income (loss) or rental income (loss) but not both) you won't need split any entity further.
For the box 13 code W amount, you'll need to determine if that is for the "main" partnership or one of the passthrough entities. The description of what the amount is for may give you a clue. For example, if it is for state income tax withheld on your behalf, that is for the main partnership.
For the box 18C, that will be for the main partnership, i.e., expenses that are not deductible by the partnership, but are instead passed to the partners.
For box 20 code A, that is for investment income, so you'll need to determine if that is for the "main" partnership or one of the passthrough entities.
For box 20 code Z, that split is given to you by the Section 199A Statement.
If you can't deduce the split from the information you have, you'll need to contact the preparer of the K-1 for more information.
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