Why aren't conda commands working in Spyder?

I recently downloaded Spyder using Python 3.9.12. For some reason, every time I try to use a conda command (such as conda activate env), the Spyder terminal gives the message 'Note: you may need to restart the kernel to use updated packages.' I've restarted the kernel multiple times, but the same message persists, essentially meaning that I cannot use conda commands in Spyder. However, they work fine in the regular Anaconda3 prompt. Does anyone know how to fix this? Thanks in advance!