My outfit is two pieces a harness skirt and a onesie both from Amazon, but the brand is Littleforbig.
Popular alternatives to
Littleforbig Overall Skirt ...
AZMED Maternity Belly Band for Pregnant Women | Pregnancy Belly Support Band for Abdomen, Pelvic, Waist, & Back Pain | Adjustable Maternity Belt | For All Stages of Pregnancy & Postpartum (Beige)