Claiming partnership expenses without a K1

Hello,

I was involved in an LLC partnership that was shut down in 2024. My ex-partners - and in particular the partner that did the LLC's taxes - did not send me a K1. I don't know whether a 1065 was filed for the business for 2024; the breakup was acrimonious.  Is there some way that I can file a "substitute K1" on my own behalf, so that I am in compliance with IRS rules, as well as so that I can claim my own losses from this partnership?

Thanks

MG