Here are all the T2a1b1a ancients, in case someone apart from me is also interested in this haplogroup. Don't mind the colours, it's just a copy/paste.

Object-ID mtDNA-Haplotree Y-Haplotree-Variant Source Date Simplified_Culture Culture_Grouping Location Country
AITI_40 T2a1b1a1b R-L51 MittnikScience2019 1883-1693 calBCE (3469±28 BP, MAMS-21570) CEU_EBA EBA Lech Valley Kleinaitingen – Gewerbegebiet Nord Germany
I5516 T2a1b1a1b R-P312 OlaldeNature2018 1872-1547 calBCE (3400±35 BP, SUERC-2869) Britain_CA_EBA Scotland_CA_EBA Doune, Perth and Kinross, Scotland Great Britain
I3132 T2a1b1a R-S5488* OlaldeNature2018 2126-1886 calBCE (3614±33 BP, SUERC-69070) Britain_CA_EBA Scotland_CA_EBA Covesea Cave 2, Moray, Scotland Great Britain
V7 T2a1b1a1 R-M417 SaagCurrBiol2019 775-421 calBCE (2484±41 BP, UBA-26113) Baltic_EIA Estonia IA Ilmandu, Harju, EST Estonia
X05 T2a1b1a1 R-PF6162 SaagCurrBiol2019 1205-1012 calBCE (2908±26 BP, SUERC-44069 (GU29247) Baltic_LBA Estonia LBA Muuksi, Harju, EST Estonia
X08 T2a1b1a2 R-YP340 SaagCurrBiol2019 925-815 calBCE (2733±26 BP, SUERC-80021 (GU47832) Baltic_LBA Estonia LBA Muuksi, Harju, EST Estonia
NAU001 T2a1b1a* R-Z93 SaagSciAdv2021 2836–2573 calBC Fatyanovo Fatyanovo Naumovskoye Naumovskoye, Yaroslavl Russia
poz794 T2a1b1a2 JurasAmJPhysAnthropol2020 2021-1773 cal BC Poland_EMBA Strzyżów culture Raciborowice Kolonia 2 Poland
I2981 T2a1b1a* OlaldeNature2018 1880-1635 BCE (3444±32 BP) [R_combine: (3320±50 BP, AA-51418); (3520±40 BP, AA-43651)] Britain_CA_EBA Scotland_CA_EBA Stenchme, Lop Ness, Orkney, Scotland Great Britain
MJ-08 T2a1b1a JärveCurrBiol2019 775-486 calBCE (2490±30 BP, Poz-) Srubnaya Late Srubnaya Kumy Ukraine
VK303 T2a1b1a1 MargaryanNature2020 900-1200 CE Viking Viking Sweden Skara Sweden

Source