Then change the color profile to "CMYK" if you are using Canva Premium. If you don't have Canva Premium, just use "RGB"
Last "Download"
Send the file to your subscription printer.
Note: Please consult the printing company whether the print will break or not. Because Canva has design size limitations, especially for sizes 2.5m x 0.6m and 3m x 0.6m.
If your local printer does not accept PDF files, then use PNG files. Still consult your regular printer.