What is the purpose of blue bar below expansions?

SirJeffEpstein

I had assumed it was the number of card in an expansion, but there appears to be way more. For example, I am at 152/165 in the Scarlet & Violet 151 Expansion when looking in the shop. What does that mean?

Baulder

I'm not sure what else does it appears to you, but It's exactly what it suggest to be.

A visual guide on how many cards from that specific expansion you've already collected.

When you collect every card from that expansion, the bar will be completely filled blue.

I'm more curious about the less obvious one, and that is the sphere pulsing with blue color in the top right corner, next to the "three dots" icon which open the menu.