Hoping this interesting, imo link is fine to post.
Regarding crossed legs in death, fwiw.
The History Girls: CROSS YOUR LEGS AND HOPE TO DIE: What those effigies are really telling you by Elizabeth Chadwick

Cross-legged effigy of William Marshal II in the Temple Church (he didn't go on crusade)

Late 13th century effigy of Robert Curthose, son of William the Conqueror (d.1134) He did go on
crusade which may have helped to promulgate the idea that crossed legs = crusader

Southwark Cathedral wooden effigy. Possibly a de Warenne.
Late 13th century. Relaxed pose.
Why do Jews from Islamic lands object to sitting with crossed legs in a synagogue?
"This is what Rabbeinu Peretz wrote in his Gloss to
Sefer Mitzvot Kattan (No. 11, subparagraph 2, Satmar, 1935, p. 9):
When you pray while seated [i.e., not during the Amidah], do not lean back, and do not lean to the sides,
Do not stretch out your legs, and do not put one leg on the other,
For all of these are haughtiness.
Rather sit with your head bowed, so that you don’t see the face of the person sitting opposite you outside of four cubits [= two meters],
And put your hands under your cloak, the right on top of the left,
and sit in fear and trembling.
Rabbeinu Peretz is of the opinion that a person who sits and prays in the synagogue must sit in a dignified fashion without leaning back or to the sides, without stretching his legs out or crossing his legs, but rather to sit with his head bowed in order to avoid looking at the other worshippers. He does not want the worshipper to sit in “haughtiness”, but rather “in fear and trembling”. And as for his opposition to sitting with crossed legs, it is possible that he was influenced by French etiquette in his day, as we have seen in connection with other customs.(5)"