Hello and welcome to TSG!!
The Roku Express+ has Composite connections. I have one of these, though I use it with HDMI.
https://www.amazon.com/Roku-Express-Streaming-Player-Composite/dp/B01M2AJZ5P
Alternatively, there's this device, though I cannot speak for it, having never used it. https://www.walmart.com/ip/HDMI-to-...MI1dS-p_jq5QIV9f7jBx2lewJ0EAYYAiABEgKsyPD_BwE
The Roku Express+ has Composite connections. I have one of these, though I use it with HDMI.
https://www.amazon.com/Roku-Express-Streaming-Player-Composite/dp/B01M2AJZ5P
Alternatively, there's this device, though I cannot speak for it, having never used it. https://www.walmart.com/ip/HDMI-to-...MI1dS-p_jq5QIV9f7jBx2lewJ0EAYYAiABEgKsyPD_BwE