Is byte a viable option if a person has a couple of bridges?
Anecdotally, I know that byte is often able and willing to treat individuals with bridgework, but I think this would probably depend on factors specific to your teeth and the location of your bridges.
I'll look into your question further, and will follow up if I'm able to gather better information.
In the mean time, you could certainly try sending in your impressions. Byte will refund the full cost of your impression kit if they conclude they're unable to support your aligner treatment.
Quick follow up here - byte does note the following in their customer consent form:
"Aligners will not move implants and may not be effective on some dental restorations, such as bridges. Additionally, dental restorations, such as crowns, veneers, or bridges, may require replacement due to tooth movement."
Again, this doesn't necessarily mean that bridgework disqualifies someone from byte treatment, as that appears to be case-by-case. Though, it probably worth considering that there would be some risk you could need to replace/repair the bridge following treatment with byte. Presumably the same is true of all aligner products.