can you indicate which part of wall that you want to hack?

Not all precast building is built the same way using standard components and assembly.

Unless original structural plan or as built plan is available to outsiders, only the consultants involved in the design and construction of the original building can advise if and where you can hack without adding beam.

Anybody else will take that safe approach to replace the hacked walls in red, with beam. One can't really tell from looking at limited photos and S&P plan.

Approach your developer and enquire if your intended renovation can be done or if can give you plan indicating which areas can hack. They should check with their specialists then revert back to you. As purchaser you have the right to know. Better than asking and checking elsewhere, which ultimately is best guess only. You are the first hand buyer, and have this privilege, unlike sub sales case.

Also, their sales office may have videos on how the precast construction is carried out. Many big developers had setup their own IBS plants in the race to stay ahead of others so they should have something to show.