Time-Efficient Mobility?

I work a 12 hour shift, and during my work I don’t really want to look weird by getting on the floor and doing planks, hip thrusts…etc…, so I do my mobility stuff at home.

I don’t have much time at home because of the 12 hours at work, though, so what would you say the most time-efficient way of increasing mobility is?

My goals at the moment are hip mobility and lumbar stability.

What are the best ‘bang-for-your-buck’ hip mobility and lumbar stability exercises/routines?

Thanks in advance!!