Here’s what Flux docs say about placing and wiring parts in a schematic:

“This is the most relevant entry I found related to your request.”

“How do I create a circuit schematic and connect components in Flux?

“How can I label nets or create named connections in the schematic?
Use net portals by placing a portal symbol on a wire and entering the desired net name. Any portal sharing that name will automatically connect the nets. Learn more in the Schematic – Net Portals guide”
Source

Recommended screens to use with your Pico

Wiring recipes (Pico pins already in your project)
I2C OLED (SSD1306):

What would you like me to add and wire in your schematic?

Tell me A or B (and confirm if your OLED/TFT already has onboard pull-ups/level shifting). I can then place the parts and wire them to GP4/GP5 or your chosen SPI pins in this project.