Try this, find a channel number not being used( I’m using 250 in the example) create a custom channel source, name it smithguidedata, choose HLS, text, copy and paste this
#EXTM3U
#EXTINF:-1 channel-id="250" tvg-id="250" tvg-chno="250" tvg-logo="https://tmsimg.fancybits.co/assets/s58532_ll_h15_aa.png?" tvc-guide-stationid="58532" tvg-name="Smithsonian HD",SMTHHD
http://192.168.1.65:8089/devices/ANY/channels/250/hls/master.m3u8
Choose prefer channel number from m3u
Save
Go to your source(hdmi capture)for your Smithsonian channel and hit manage lineup scroll to 9001 and hit pencil search all for SMTHHD
If it is there, assign it.
Now go back to source smithguidedata, manage lineup and hide channel 250 with the void button
There is probably a better way to do this but with the info you have provided this is the best I can do