Welcome back to the workforce.
Flip flops are too casual for my workplace but capris are ok. Panty hose is now a fashion faux pas anywhere now.
I just recently re-entered he workforce at a larger company. (my other company was very small & I dressed pretty casual)
There is a dress code in their employee's manual, but it does not mention panty hose as a requirement. I was surprised to see both younger & older women not wearing panty hose, unless dressed for a formal meeting, etc.
There are widely different job positions where I work, so we dress accordingly. For example, those who are in contact with the public all the time dress more formal, etc.