The India v Bangladesh World Cup cricket match was definitely on both the live Sky Sports Main Event and Sky Sports Cricket channels today, where it was showing for me on the NOW App on my Amazon Fire Stick.
I didn't watch all the game, but I watched bits during the day.
Did the match not appear on your NOW App playback devices under either the TV Guide or under the dedicated Sports section grid row showing the live Sky Sports channels ?
Or was you encountering some sort of error code or message when attempting to open the live stream ?
You should see it in the Sports homepage. On the top menu, select Sports. In the first row (called Top Picks at the moment) you should see a tile for "ICC Cricket World Cup". This goes to the collection for both live and catch-up content. The first row generally has the live games, both today and upcoming.