Yep this ^
Generally penal code 288.2A2: Sending Harmful Matter with Intent to Seduce a Minor is characterized as something along the lines of sending “pron” or even images of himself of s*xualized nature over text, email, Snapchat, Instagram, TikTok, etc. with language or context that implies him & them (the minor) having that sort of interaction.
Likely recent and ongoing up until recently, something along the lines of a parent found out and got FBI/ authorities involved in real time.
$140,000 bail is steep… that is generally not the bail amount for “just” lewd texts between adult and minor.