I noticed that this page pops up on the supermicro website now.
EPYC™ 3000 Embedded Motherboards | A+ Motherboard | A+ Servers - Super Micro Computer, Inc.
despite it not looking like these boards would have onboard 10GBe it seems to be listed
Other Key Features
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M11SDV-4C-LN4F Coming Soon
Mini-ITX Up to 512GB ECC DDR4-2666MHz SDRAM in 4 DIMM slots Up to 8 SATA3; RAID 0, 1, 5, 10; 1 M.2 (M Key 2280) EPYC™ 3151 SoC, 4 Cores/8 Threads, Passive Heatsink, 10GBase-T LAN
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M11SDV-4CT-LN4F Coming Soon
Mini-ITX Up to 512GB ECC DDR4-2666MHz SDRAM in 4 DIMM slots Up to 8 SATA3; RAID 0, 1, 5, 10; 1 M.2 (M Key 2280) EPYC™ 3101 SoC, 4 Cores/4 Threads, Passive Heatsink, 10GBase-T LAN
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M11SDV-8C+-LN4F Coming Soon
Mini-ITX Up to 512GB ECC DDR4-2666MHz SDRAM in 4 DIMM slots Up to 8 SATA3; RAID 0, 1, 5, 10; 1 M.2 (M Key 2280) EPYC™ 3251 SoC, 8 Cores/16 Threads, Active Heatsink, 10GBase-T LAN
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M11SDV-8C-LN4F Coming Soon
Mini-ITX Up to 512GB ECC DDR4-2666MHz SDRAM in 4 DIMM slots Up to 8 SATA3; RAID 0, 1, 5, 10; 1 M.2 (M Key 2280) EPYC™ 3251 SoC, 8 Cores/16 Threads, Passive Heatsink, 10GBase-T LAN
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M11SDV-8CT-LN4F Coming Soon
Mini-ITX Up to 512GB ECC DDR4-2133MHz SDRAM in 4 DIMM slots Up to 8 SATA3; RAID 0, 1, 5, 10; 1 M.2 (M Key 2280) EPYC™ 3201 SoC, 8 Cores/8 Threads, Passive Heatsink, 10GBase-T LAN