Do not worry Intel will release new microcode for your CPU platform as well. For all Skylake X SKUs we're now safe with 02000064 microcode.
9900K microcode for Intel TAA mitigation was 000000CA DATE 2019-10-03
cpu406E3_platC0_ver000000D6_2019-10-03_PRD_3D233333 (>cpu406E3_platC0_ver000000D4_2019-08-14_PRD_BD56B796)
cpu506E3_plat36_ver000000D6_2019-10-03_PRD_152B6526 (>cpu506E3_plat36_ver000000D4_2019-08-14_PRD_1BCBD45F)
cpu806E9_plat10_ver000000CA_2019-10-15_PRD_0845AC10 (>cpu806E9_plat10_ver000000C8_2019-10-03_PRD_27A41211)
cpu806E9_platC0_ver000000CA_2019-09-26_PRD_78D29498 (>cpu806E9_platC0_ver000000C6_2019-08-14_PRD_98458A98)
cpu806EA_platC0_ver000000CA_2019-10-03_PRD_B1048E10 (>cpu806EA_platC0_ver000000C6_2019-08-14_PRD_DBBB8DB0)
cpu806EB_platD0_ver000000CA_2019-10-03_PRD_C2B95181 (>cpu806EB_platD0_ver000000C6_2019-08-14_PRD_615B03A6)
cpu806EC_plat94_ver000000CA_2019-10-03_PRD_3C7347B2 (>cpu806EC_plat94_ver000000C6_2019-08-14_PRD_F8A49D59)
cpu906E9_plat2A_ver000000CA_2019-10-03_PRD_2F24390B (>cpu906E9_plat2A_ver000000C6_2019-08-14_PRD_E91B42FC)
cpu906EA_plat22_ver000000CA_2019-10-03_PRD_7BC0FAE1 (>cpu906EA_plat22_ver000000C6_2019-08-14_PRD_C34D9A63)
cpu906EB_plat02_ver000000CA_2019-10-03_PRD_298BE2D2 (>cpu906EB_plat02_ver000000C6_2019-08-14_PRD_7C30A4E1)
cpu906EC_plat22_ver000000CA_2019-10-03_PRD_C2FCDC8A (>cpu906EC_plat22_ver000000C6_2019-08-14_PRD_177C8996)cpu906ED_plat22_ver000000CA_2019-10-03_PRD_2DCD81FE (>cpu906ED_plat22_ver000000C6_2019-08-14_PRD_FB15B2A4)
cpuA0660_plat80_ver000000CA_2019-10-03_PRD_EF2CAC0C (>cpuA0660_plat80_ver000000C6_2019-08-27_PRD_BF94E0B9)
W11 25H2 27744.1000 Core i9 7980XE 02007108 MCE ME 11.12.96.2535 R6E Modified BIOS 4001 SAMSUNG OG9 FW 1019.0 SSD 970 EVO PLUS 1 TB x 3 NVIDIA RTX 4090 GAME READY 566.14 64GB GSKILL DDR4 3200MHz JBL 9.1 Sound Bar DTS-X