So I've been maining Protea for a while now and making a build for Protea Prime, but I realised I'm not 100% familiar with the details on her shield gating. I just need clarification on a few key aspects.

Does she actually have a longer shield gate invulnerability duration? It feels like she does and I've seen others say she does. If so, how long is it?

Another question is how does work it with her regular (non-satellite) shield gating? For example my Protea Prime has 780 shield ( i have 1x tau blue archon shard embedded). It says I'm invulnerable for 2 seconds. Does this mean it's 2 seconds + whatever duration the shield satellites add? Or do the shield satellites have their own shield gating invulnerability that overrides this base 2 second one?

I'm trying to determine if this one blue shard is worth having, considering it extends the shield gate invulnerability due to having more shields.