For me, I put the collapsible bath tub on my dining table or kitchen sink. I don’t leave her unattended and I made sure the area is free from accidents. As I had c-sect, I can’t afford bending up and down. And I’ll do so even if I had a normal delivery. I don’t fill up the tub so full, just nice to cover half her body as she has a float to lie on 45 degrees that comes with the tub.
When she was bigger and can sit, I placed her in the toilet sink and shower her in there using the shower head.