I did some Googling and it seems that Henry Solomon Strickland who was married to Sarah Lanier was the son of John Strickland and Appa Martin, which is what my DNA couin has in his tree:
https://www.genealogy.com/ftm/g/o/u/Patti--Gouker/GENE6-0001.html
JOHN1 STRICKLAND, JR.1 was born Abt. 1749 in Old Edgecombe County, North Carolina2, and died Abt. 1838 in Turkey Creek, Tattnall County, Georgia.He married APPA UNKNOWN3 Bet. 1768 - 1770 in Bladen County, North Carolina.
Children of JOHN STRICKLAND and APPA UNKNOWN are:
i. JOHN2 STRICKLAND III4, b. Abt. 1770, Old Bladen County, North Carolina; d. March 1801, Halifax County, North Carolina; m. MARY TAYLOR4, Abt. 1793, North Carolina, South Carolina?.
ii. JEFFERSON RUEBEN STRICKLAND4, b. Bet. 1771 - 1774, Old Bladen County, North Carolina; d. May 09, 1859, Bainbridge, Decatur County, Georgia; m. (1) HARRIET WILSON4, Abt. 1792, Wake County, North Carolina; m. (2) CLARA (CLOEY) FAIN4, 1826, Tattnall County, Georgia.
2. iii. RICHARD STRICKLAND, b. Abt. 1775, Old Bladen County, North Carolina; d. Bet. 1834 - 1840, Wayne County, Georgia.
3. iv. DAVID JONATHAN STRICKLAND, b. Abt. 1780, South Carolina; d. March 14, 1873, Ware County, Georgia.
v. ELIZABETH STRICKLAND4, b. Abt. 1788, Old Bladen County, North Carolina; d. Abt. 1828, Bryan County, Georgia; m. THOMAS HENRY ALBRITTON, SR.4, Abt. 1802, Bulloch County, Georgia.
4. vi. HENRY SOLOMON STRICKLAND, b. Abt. 1794, Georgia; d. Abt. 1866, Lowndes County, Georgia.
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So this John Campbell Strickland and wife Appa Martin would be the correct parents for this Henry Solomon Strickland, which would also resolve some of the issues reported in 2020 about the age difference of him and the other wives connected to him. They aren't his wives. Only Sarah Lanier was his wife.