Biden will start out as a lame duck for at least the next 2 years, which means he has minimal influence on the 2A. We will maintain the lead in the senate to block any gun control bills. All of the SOCTUS and appeals court judge vacancies are already filled, and any new vacancies will be filled with moderates. Biden can restrict international imports of guns and ammo through tariffs and regulations. He can also change regulations for FFL"s to make their lives harder, change ATF regulations, and reenact regulations that Trump deleted which could drive up the overall cost of doing business in America. There is a chance we could lose the Senate in 2022 with 20 Republican seats vs 12 Democrat seats up. However we dashed Democrat hopes of a clean sweep in 2022 by winning, not losing, House seats this year. The Democrat party is going through turmoil right now because of this with progressives and moderates fighting over election losses. This should lead to a more moderate House in the future.
For the near term, ammo and gun availability dermand has peaked. The panic will slowly subside due to Republicans retaining control in the Senate and positive news on a COVID vaccine in December. The riots will go down a bit both because it's cold in the winter and Biden is President. I see ammo availability returning to normal this summer, however I don't see the epic low ammo prices returning for a long time, if ever.