This question is very academic, but uncommon for it to impact what you can do in practice. The short answer to the academic question is "False", as neither wire types are permitted indoors if USE or USE-2 is all that we know about the wire type. The long answer is, it is most probable that you can use it indoors in conduit, but you have a burden of proof to look for other ratings that it also carries.
Most USE wire and USE-2 wire, that you will find manufactured today, also carries ratings of RHH/RHW/RHW-2, that allow it to be used according to the uses permitted of these wire types. I.e. inside buildings in conduit, as well as other uses such as aerial cable on messenger wires. I have never seen wire that exclusively carries ratings of either USE or USE-2, without also carrying ratings in either the RH-family or the XH-family (XHH, XHHW, & XHHW-2). These ratings permit you to use it just like any other building wire, once you account for its larger diameter due to significantly thicker insulation.
If you did find wire in the USE-family, that didn't also carry ratings in either of the other two aforementioned families, then you would be restricted to exclusively using it as underground service entrance wire as the name implies. It is only permitted underground, and only permitted above ground where necessary to terminate on service equipment. The -2 rating indicates dual rated for both 75C and 90C, and therefore the 90C rating can be used as a starting point for derate calculations. Straight USE is 75C rated, while USE-2 is 90C rated. Both are wet-location rated, but neither is permitted inside buildings without also carrying other ratings to override this restriction (which is the case for most USE and USE-2 wire made today).
