I am using Android.
I have found that I can print the logo stored in my printer using the ESC/POS commands 1C 70 01 00
I have the SBV-80B-USEWB Multi Interface Receipt Printer (generic Bluetooth/wifi/LAN/USB/COM): https://store.varlink.co.uk/SBV-80B-USEWB_80mm_Thermal_Printer_[UK]__48512.html
I have selected Other Model, Bluetooth 80mm printer. (it is listed as KP80)
In the Advanced section for the printer, (Settings | Printer model | Advanced Settings, add the following into the Initial ESC/POS commands box:
You will have already uploaded your logo to the printer using the supplied software from the printer manufacturer. Remember that it is black and white.
Of course, I am sure that you could print your logo at the bottom of the printer if you added those commands just before the cutter commands on that screen (Just tried it - it works..)