@Randy560 Airbnb does not control your pricing, you do. Even when using Smart Pricing, the host sets the minimum and maximum.
So of course, you can set whatever prices you want manually. Plenty of hosts only set their pricing manually, no algorithm involved, ever.
Now if you use Smart Pricing and want to set prices manually for certain dates, I couldn't tell you what is involved to make sure the Smart Pricing doesn't override your own set prices, as I have never used Smart Pricing, but hopefully another host here can advise on that.