I just have to add here that
@Talal205 mentioned they currently have a score of 404. So even a high B2 in French would only get them to 468. It might actually be lower than that because the bonus for french is contingent on getting an NCLC7 in IELTS as well. So their best bet is to actually increase IELTS to get to 460+ and then french to get to 470+ (with a low B2) or 500+ (with a high B2). Unfortunately, one of the two will not suffice.
I'd say go mess around with the CRS calculator to see what combination you actually need. Based on what they've mentioned, high IELTS + french is the only way they stand a chance. Or PNP if they are in the right field of work. Incidentally 460 also seems to be the sweet spot for Ontario tech draws.