Honestly, it is not feasible to provide explanations here. You will need to consult your lawyers for this.
On a generic note, I can say that there is absolutely no structure or recourse for the investors on how the LLP shall function. Why would someone give away such rights? The closest structure I can think of is the Debenture Trust Deeds executed while issuing NCDs. You can google them. I have attached a random one that I came across. You will yourself be able to make out all sorts of covenants that will typically be required to manage investments from public.
This brings me to the next one... they are raising capital from public. They don't seem to have any registrations with either SEBI or RBI.
Oh, and you sign the LLP agreement! This has its own set of compliance headaches. Who ensures compliance? Do you get indemnity? You designate someone else as the authorised signatory. Is this limited authorisation? Where is this documented?
How are meetings conducted? How are investors represented?
There is no personal liability of the Designated Partners here by design. There are no representations or warranties. Big red flags. (Who negotiated this?)
There could be a hundred more questions. Obviously, I do not have all the information so may be not all of them are relevant. You be the judge of that. But if it was me I would never sign their clause 3.3 where you provide perpetual rights on using your name in any manner whatsoever without prior consent. (I have picked the least troublesome clause as an example)
https://www.bseindia.com/corporates/download/316577/PPDI_Prior/NCD DTD 11th Aug 2021_20210816172742.pdf