There is no regulatory (EASA land) requirement, to increase any margins for LVTO such as TOGA thrust, flap setting, contamination or wind components.
Some operators do feel, perhaps based on their own experience, that it is prudent to make LVTO a more conservative, strictly standardized operation. Hence some additional requirements such as C/L only with PBRK=ON. Such approach is admirable, and some of the restrictions may even come from the manufacturer's suggested SOPs. CM1=PF perhaps.
Unless extremely clearly worded in the manuals and well explained, those additional requirements could become a source of confusion for line crews. Writing unambiguous manuals and explaining things to pilots are, both of them independently, forms of black art.