Q.Portulaca
I usually plant portulaca in a pot. I’d like to plant something else in the pot. Any suggestions for what to pot with it?

When you put more than 1 plant variety in a pot, the important thing is to make sure they have the same water, light, and soil requirements. So you want to look for plants that do well light soil, with not too much water, and good sunlight. Using these requirements, there are literally hundreds of choices. I suggest you visit some plant stores near you, to see what's available. This article might give you some more ideas: https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/exotic-showstoppers-beautiful-succulents.htm