She can try applying for TRV once sponsorship approved. However there is no guarantee that she will get it or not, it's all depends on the consideration of Canadian embassy officer in Thailand. I guess she will absolutely be requested for interview so if all her answers satisfy the officer, she should get TRV. From my opinion (which might not be true), I think if your case is you have had relationship with her for quite enough and got married, not like just met and got married right away, there shouldn't be a problem to get TRV.