Baby constipation

Hello 👋🏻

Our LO is 6 weeks old and she is EFF for about 2 weeks now.

Before, while breastfeeding, she pooped in every diaper change (approximately 8-10 times a day). Ever since we started formula pooping progressively decreased from 8-10 times to 4 times, then 2 times per day and now she poops once every 2 days.

During day she struggles a lot but only little farts are coming out and no poop.

We are also trying bicycling and squating positions, belly massages and warm baths during the day but nothing seems to work.

Are there any other tips we can use?

Is this normal or we have to change formulas again?

Ps: we’ve changed 2 formulas in 1 week and now we are on formula no3 for 1 whole week.