Most likely you can use the waveshare35a overlay.
The tft35 has very bad performance (5fps)
cd~
wget https://files.waveshare.com/upload/1/1e/Waveshare35a.zip
miniunzip Waveshare35a.zip
mv /home/volumio/waveshare35a.dtbo /boot/overlay/waveshare35a.dtbo
nano /boot/userconfig.txt
dtoverlay=waveshare35a:rotate=90,speed=41000000,fps=50