A simple Python3 script convert a list of POIs into a .ov2 file for loading e.g. onto a GPS satnav.

pois.py

# Once you have added your POIs to the list below, run the script to output them
# to a file called "pois.ov2".
#
# Next, login to plan.tomtom.com and from the menu on the left navigate to
# My Items > POI Files and then click on Import OV2 File. Once uploaded, the
# file will then be sync'd to your GPS where it is available from My Places in
# the menu.

import struct

pois = [
    ("McLaren", 51.34314, -0.54252),
    ("Williams", 51.61672, -1.41096),
    ("Alpine", 51.92018, -1.38986),
    ("Haas", 52.06374, -1.31433),
    ("Mercedes", 52.02262, -1.1495),
    ("Aston Martin", 52.07592, -1.0296),
    ("Red Bull", 52.00815, -0.6929),
]

def main() -> None:
    with open("pois.ov2", "w+b") as file:
        for poi in pois:
            lat = poi[1]
            lon = poi[2]
            name = poi[0]

            print(name)
            print("lat", lat)
            print("lon", lon)

            lat = int(lat * 100000)
            lon = int(lon * 100000)

            lat_bytes = struct.pack("<l", lat)
            lon_bytes = struct.pack("<l", lon)
            name_bytes = bytes(name, encoding="utf8")
            rec_len = struct.pack("<l", 1 + 4 + 4 + 4 + len(name) + 1)

            rec = b"\x02" + rec_len + lon_bytes + lat_bytes + name_bytes + b"\x00"

            # print(rec)
            print()

            file.write(rec)

if __name__ == "__main__":
    main()