question about processor generations

i am in the proces of building my computer the last one i built was a intel based desktop but im going for a amd this time
i have been out the building game for awhile and have bought them pre assembled for like 4 years
my question is this my tuf b450m-plus gaming motherboard says ryzen 3000 ready so would the
AMD Ryzen 9 3900X Processor be compatible out of box