
FlightComputer
jbrown3859/EE175-SeniorDesign
CubeSat Flight Computer and Radio - EE175 Senior Design F22
STMicroelectronicsExtended
-40℃~+85℃ 12bit 12bit 256KB 2V~3.6V 32 Bit 48KB 72MHz 80 ARM Cortex-M3 Built-in FLASH LQFP-100(14x14) Microcontrollers (MCU/MPU/SOC) ROHS
The STM32F103VCT6 is a microcontroller made by STMicroelectronics in a LQFP-100(14x14) package with 100 pins. -40℃~+85℃ 12bit 12bit 256KB 2V~3.6V 32 Bit 48KB 72MHz 80 ARM Cortex-M3 Built-in FLASH LQFP-100(14x14) Microcontrollers (MCU/MPU/SOC) ROHS.
PCBKit's library has its KiCad symbol (MCU_ST_STM32F1:STM32F103VCTx, from KiCad's library) and its footprint (Package_QFP:LQFP-100_14x14mm_P0.5mm, from KiCad's library), ready for a KiCad board. 5,892 are in stock at JLCPCB (part C8313). 2 open-source boards in 2 repositories on GitHub use it.

jbrown3859/EE175-SeniorDesign
CubeSat Flight Computer and Radio - EE175 Senior Design F22

punkfab/pcb-corpus
235 real KiCad boards from open-source hardware repositories, prepared as a placement and routing benchmark
Yes. The symbol is MCU_ST_STM32F1:STM32F103VCTx and the footprint Package_QFP:LQFP-100_14x14mm_P0.5mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
LQFP-100(14x14), with 100 pins. Its footprint is drawn on this page.
STMicroelectronics publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C8313, with 5,892 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the STM32F407VGT6 by STMicroelectronics, the GD32F303VET6 by GigaDevice Semicon Beijing, the GD32F407VET6 by GigaDevice Semicon Beijing and the GD32F407VGT6 by GigaDevice Semicon Beijing. Check their datasheets: a part that fits the footprint may still differ in its ratings.
2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.