Hi John,
You could try sparking her interest by engaging with other mutual friends or coworkers that the both of you have.
Due to the COVID-19 situation, a lot of people are doing group video chats.
She may also be participating in these.
Try to get in on these group video chats with mutual friends or coworkers that you may both have.
When you do, let your personality shine through and be as talkative as possible.
This will give her a better opportunity to pick up on what your personality is like.
You may even make her laugh as you crack jokes or tell funny stories to the group.
She seems to be really shy and hence why she would avoid looking at you at work and would avoid talking about you whenever you were around.
A shy girl often needs to get comfortable with a guy before she is willing to open up.
Again, being that we are in unusual circumstances with COVID-19 and you are unable to let her get a good idea of your personality in person at this time, your best option may be in getting on these group video chats with mutual friends and coworkers.
Seeing more and more of your personality may cause there to be a spark in interest on her part and thereby, you may still be able to attract her.