Q.What are these in my houseplant?
My indoor Ti plant that stays indoors has this infestation. These gross things are in the water tray and on top soil. They don’t seem to be moving. What are these?
It is difficult to see from the image, but I believe these may be millipedes in your soil.
Millepedes pose no problem, but you will want to remove them from the pot in your home.
Allow the soil to dry and pick out the pests. Spray the soil with an insecticide, follow the package instructions.
Check under the pot, where the conditions may be damp.
https://www.gardeningknowhow.com/houseplants/hpgen/common-bugs-and-pests-on-houseplants.htm