There is no verified evidence that Donald Trump sexualized a 10-year-old; existing allegations and documented remarks involve older minors or adults, but not specifically a 10-year-old child.
Donald Trump sexualized a 10 year old

All the assault allegations against Donald Trump, recapped - PBS News
Source: pbs.org
Key Evidence
Trump made remarks about 14-year-old girls in 1992, not younger children.
chicagoist.comchicagoist.comTrump Sexualized 14-Year-Old Girls In 1992 Tribune Quote
A legal case involves an accusation of rape when the accuser was 13 years old, but this is under court review and does not mention a 10-year-old.
independent.co.ukindependent.co.ukThe Donald Trump underage rape accusation explained
No credible source documents Trump sexualizing a child as young as 10 years old (
chicagoist.comchicagoist.comTrump Sexualized 14-Year-Old Girls In 1992 Tribune Quote through
thewrap.comthewrap.comHere's What Trump Told Howard Stern in 2006 When Asked About His Minimum Sexual...).
What the Evidence Shows
The claim that Donald Trump sexualized a 10-year-old is misleading based on available public information and credible sources.
The closest documented instances involve Trump making comments about 14-year-old girls,chicagoist.comchicagoist.comTrump Sexualized 14-Year-Old Girls In 1992 Tribune Quote which is still inappropriate but not about a 10-year-old.
Allegations of sexual misconduct against Trump include claims involving adult women and some allegations involving minors, such as a rape accusation by a woman who was reportedly 13 at the time.independent.co.ukindependent.co.ukThe Donald Trump underage rape accusation explained However, this case is under legal review and does not specifically mention a 10-year-old.
Other sources document Trump's controversial remarks about his own daughter as an infantirishstar.comirishstar.comTrump makes 'disturbing remarks' about his 1-year-old daughter in resurfaced... and his comments on minimum sexual age limits,
thewrap.comthewrap.comHere's What Trump Told Howard Stern in 2006 When Asked About His Minimum Sexual... but none confirm sexualization of a child as young as 10.
Multiple assault allegations against Trump have been reported,pbs.orgpbs.orgAll the assault allegations against Donald Trump, recapped
en.wikipedia.orgen.wikipedia.orgDonald Trump sexual misconduct allegations but none explicitly state sexualization of a 10-year-old.
Therefore, while there are serious allegations and documented inappropriate comments involving minors and adults, the specific claim about sexualizing a 10-year-old lacks substantiated evidence and is misleading.