I would personally be slightly suspicious of the "12000mah" description on Takealot, there are are some 8800mah units that have been incorrectly described as 12000mah on there. Sometimes one sees reviews there where people have opened them to find the same 4*2200mah cells as on all the 8800mah units. There are loads of identical 8800mah units like that, all from the same base model but sometimes with different branding or an extra cable or something, but generally they are the same model one can order in bulk from China.
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It looks like even the newer 530p model will still have 4*2200mah li-ion cells:
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The thing about the 8800mah/32wh units is they are cheap and will give you a good period of service before declining too much, even if they are not LFP - I had one on my router a couple of years ago before replacing with a
Gizzu 69wh LFP unit which has been excellent. But I still have that old 430p ups as a power supply for a 12v emergency light so it's still in use in some way and for the price they will do the job for a while.