During the Bangladesh Liberation War and related Indo-Pakistani war of 1971 which lead to the independence of Bangladesh, the US executive branch is known to have sent Task Force 74 in the Bay of Bengal in support of the Pakistani government. I have recently been told that France did help Pakistan, and sent ships in the Indian Ocean during that period.
From the few sources I could find (the quality of which I'm not able to vet), it seems France and Pakistan had overall good commercial relationships, and France did sell weapons to the Pakistani Navy before and after the war. On the other hand, during the conflict, France abstained from 4 UN votes for resolutions supported by Pakistan, the US, and/or China, de facto supporting the Indian position (or at least not opposing it), along with the USSR and the UK. The linked article also mentions sanctions on Pakistan, but I haven't been able to find confirmation in contemporary French media.
So, overall, it seems to me like France was not siding with Pakistan in any direct way. Is there any reputable source suggesting that:
- France helped Pakistan in any meaningful way
- France sent any (war)ship in the Indian Ocean