Hi, BP progress is a little different this season.
If you check your challenges, there'll be one to earn a BP level by earning Stars and/or Match XP. This will be the main way to grind for XP when you're not doing challenges, I think of it as the BP XP bar.
This starts out at 9k at the start of the week, and every time you gain a BP level via this challenge, the requirement for a level will up by 9k, to a cap of 54k.
Stars earned from completing challenges will also add to this bar, and of course you can just earn BP levels outright with certain weeklies..
There's more of a breakdown here: ...
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