At the low price they go for, they won’t have individual alnico pole piece magnets. Almost certainly a ceramic bar magnet. It’s then a matter of whether it’s got steel slug pole pieces or two steel bars. Steel bars will be fine. And with metal slugs the strings will all sit between the poles, so they will all have a pole either side. It’s not the ideal situation, but apart from maybe having to have the pickups slightly nearer the strings to get an equivalent output, it should be OK.