[DTV]

I doubt Focus on Africa and Worklife India have been big raters on BBC WN in Europe. Perhaps as local shows in their own respective regions.
They seem very non-commercial and specialist, public service broadcasting in a sense, but for other regions than Europe.
If BBC (World) News want ratings they probably need to take a different path for prime time in Europe.

I wouldn't be surprised if they didn't rate well in Europe, but Worklife India was only broadcast once a week in the afternoon in Europe, plus it hasn't been on air since December anyway. Focus on Africa does move into Europe Evening Peak for half the year, but has done so for over a decade without any real issues and evening programmes aimed at Europe have typically aired later, between 19:00 and 22:00 UKT. I'm also not sure either are non-commercial - India/South Asia and Africa are some of the channel's largest markets, and, as Matrix says, are growing in various senses.

Ultimately, I don't think it's really worth the hassle for them to bother about finding alternates for a few back-half-hours, especially as the non-Africa feeds do often drop Focus on Africa if there is major breaking news anyway (something made easier by Focus moving). Also, outside some of the Asia breakfast back-halves (Asia Business Report, etc.), I don't think BBC World News has ever really done regional variations in live news programming? Regional variation has largely been in terms of pre-recorded programmes, and even then it has been on the decline in recent years (I mean, there's nothing today like BBC World India's output in the early-2000s)