the board in your link seems to have PSRAM but in the code the selected model has "No PSRAM".

Did you ever think about multiplexing? One Header as Serial I/O and one as 2-Bit control for an external 1:4/4:1 MUX. The SN74LV4052A for example provide two1:4 paths. You can use one for the RX, one for the TX signals.
Your program need to select the channel by two bits and then do the normal UART stuff as usual.

This is not an Uiflow specific solution. Try as following:

• Decide how many steps you want from start color to end color. e.g. 10 steps
• find the step size from start to end color e.g. you want from value 100 to 200 (difference / steps) = step size 10.
• loop for the number of steps and increase/decrease the value with the calculated step size.

some USB to UART chips such as the CP210x family are customizable by the device manufacturer to have its VID and / or PID.
See: https://community.silabs.com/s/article/cp210x-customization?language=en_US
In this case you need also a cusomizated driver or telling the existing driver the new VID/PID (which is possible for example in a linux environment). It is no problem to have several drivers in parallel as they only work for devices with the correct VID/PID.

I assume you have changing text in the label. For the Y-axis set the label manually to the half of screen height minus the half of label height. The X-axis can be calculated by using half of screen width and half of label width label0.get_width().

the IP Adress is not hard coded when using DHCP to obtain it. Do you mean the hardware MAC adress? It is (theoretical) unique on every piece of network hardware.
WiFi.macAddress()

You can use the "Device File Manager" in UiFlow.

Just my comment about the missuse of the words "hologram" and "holography":
Displaying a stereoscopic or augmented reality image that seems to be floating in the room has nothing to do with holograms or holography. It is impressive YES, but it is NOT a hologram. Why do I know this? Look at my nickname! I have made my own REAL optical holograms for many years. They are made by interfering high-coherent wavefronts coming for a laser source and recording the resulting pattern in a 2D surface. There are different types of setup but all have in common the interference of a reference-beam with a object-beam. See https://en.wikipedia.org/wiki/Holography

However, mounting a real hologram on a robot arm and move it around is also possible. In case of a hologram that changes its displayed content by the angle of the light source it can be very impressive!

Hi,
your question reads like "my car will not start, what shall I do?". The standard answer to that question is "buy a new car" even if the solution would be as easy as "turn the key" or "fill some gasoline".
From your description we know you want to have a world clock and you have a m5go. What is missing:

• The environment you use to code your clock
• Your code which seems to be the problem
• the exact error message or a picture of what you call "overloaded"

please read this post first: https://forum.m5stack.com/topic/535/forum-rules-read-this-first-before-posting