Should I worry?

My LO is 6 months old and lately she’s started to do this thing when she gets frustrated—looks like a toddler throwing a tantrum.

Her face turns red and she groans angrily (like if you were constipated and strained to go). It only lasts a couple of seconds but she’s doing it more and more every day.

Like if she wants us to pick her up or if she’s frustrated with something.

Is this normal behavior at this age?