Yes you can, by zero steady partition or update to newer bootloader, you need to flash stock firmware anyway.
In case you want to buy, 5th character from the right is bootloader version.I was sent a picture of the device by the seller. Idk if they updated the device but it was ordered wednesday for a friday delivery so they could tell me build number. So where can I find a v1 bootloader? Idk what other device id be interested in but I dont have a phone anymore since last weekend. Ive thought about saying F it and just going to iPhone.
Oh note I did not buy the device. Its getting hard for sellers to tell me build number on S20.
I can tell you now that there is no "inside source", this is all profit for these 2 developers. It's stated by the 2 developers, and for perfectly understandable, yet unethical reasons that their source is a guy in China (a country of over 1.5 billion people), who has a connection to Samsung and is selling to these 2 developers exclusively, who are then in turn "doing us a favor" by being the middle-man in a transaction with this anonymous guy.
What if they told everyone: "Hey we have figured out the bootloader unlock, but instead of following XDA tradition and sharing a guide, we are going to charge everyone else a hefty fee during these turbulent times while everyone is struggling and stuck at home.".
Everyone would go wild and they'd be hated, because they're charging a Developer's Tax, and impeding a whole load of other talented Developers from gaining the motivation to develop for a phone that most people won't unlock the bootloader for; probably due to the shortage of funds and lack of jobs from the virus.
It's a sad thing honestly, and I for one can live with a locked bootloader until I've found a way to unlock it myself. Anyone who pays for the unlock is supporting a transition to a new era of XDA that steers far away from what we all came to know and love.
Most importantly, it's a slap in the face to the world of free and opensource technology, and a disgrace to those who have worked so hard to maintain the transparency these two are taking the lead in destroying; something which money can do very, very fast. There is a chance one of them will reply to this, and all I have to say is that once again, it's just to cover their ass so that they can be loved, and still line their pockets with the cash of those they're lying to. Anyways, I doubt XDA would even allow it unless the lie was present, because this isn't a marketplace.