11th gen rocket lake will require a bios update to run on z490 boards.  If past history is a guide, and considering the release date of the R11 (May 2020), I strongly suggest Dell will roll out the next iteration Aurora (ex R12) with 11th gen, and at that point the R11 will be end of life with the 10 gen.  This is how it worked with all the prior recent releases of the Aurora starting with the R5, even when the next iteration used the same chipset (ex z370).  Of course, only Dell can confirm. I just wouldn't hold my breath on this.
Will Alienware r11 offer 11gen intel in March 2021?  I ordered an R11 with the 10900 intel, with 3080RTX will I be able to upgrade to 11th gen? If not should I wait till March to order? Will alienware offer the the 11th gen in their gaming desktops?
Will Alienware offer 11gen intel