UART for 3D Printer Connection NEED HELP

I have connection to ttyAML6 after running the ldto command below and I can control the device but no confirmation is present when sending commands and I cannot set the baud rate to match the 3d printer controller.

sudo ldto merge uarta uarta-clk81 uart-a

$ dmesg | grep tty
[    0.001163] printk: console [tty0] enabled
[    1.234161] c11084c0.serial: ttyAML6 at MMIO 0xc11084c0 (irq = 22, base_baud = 10416666) is a meson_uart
[    1.235375] c81004c0.serial: ttyAML0 at MMIO 0xc81004c0 (irq = 23, base_baud = 1500000) is a meson_uart
[    2.568371] printk: console [ttyAML0] enabled
[    5.048295] systemd[1]: Created slice system-getty.slice.
[    5.084058] systemd[1]: Created slice system-serial\x2dgetty.slice.

but speed reports as 0 and have not tested any printing yet.

$ stty < /dev/ttyAML6
speed 0 baud; line = 0;
min = 0; time = 0;
-brkint -icrnl -imaxbel
-opost -onlcr
-isig -icanon -iexten -echo -echoe -echok -echoctl -echoke

sudo ldto merge uarta uarta-clk81 uart-a is merging 3 overlays that conflict with each other.

Can you offer advice to resolve the issue as well as pointing out the issue?

The Le Potato guide page links to the UART instructions: How to enable UART A and 921600 Baud Rate for AML-S805X-AC and AML-S905X-CC