Thanks for your response and clarity.
Looking at below from BCPNP program guid, I thought those requirement can be ignore with employee letter
Other Considerations
"At its sole discretion, the BC PNP may consider an application where the supporting employer does not meet the minimum requirements, including but not limited to, considering registered businesses that are regular partnerships or sole proprietorships. However, in order to be considered, the supporting employer must, at the time of application, make a compelling business case in writing to the BC PNP that demonstrates how the nomination will generate significant economic benefits to B.C."