M7T - ASX stock. T212 don’t have access to this exchange
RIB - Pretty sure you mean ALRIB, requested today so hopefully added later
SEE - Not on an exchange T212 currently support
MYSZ - Added to the list, will try next week
GDDCF - Not penny stock exempt
NEXCF - Not penny stock exempt
PHO.TO - TSE stock. T212 don’t have access to this exchange
If you go into the search function of the app and select ‘Browse All’, you can see the flags of the countries whose exchanges T212 support, so consider that before requesting stocks from ASX, TSE, etc.
For penny stocks go to otcmarkets.com and put the ticker in. On the right there are a few status bullets. You need Penny Stock Exempt to be one of them. You also need the market cap, volume and float to all be reasonably high for T212 to allow it currently, so check all that info on the same site before requesting.
Hope that helps.