You’re a little out of date! SoHO is largely shut down, has been for a decade now. Its tent pole instruments were replaced by SDO in 2010. (https://sdo.gsfc.nasa.gov/mission/)

Both of these are NASA, not NSF, observatories. They were (SoHO) and are (SDO) amazing resources that have advanced the whole area of heliophysics.

DKIST (NSF) has a 4m aperture. Unbelievable for a solar telescope, and of course, impossible to fly under reasonable NASA heliophysics budgets.