Rollei is just the brand name, which is owned by RCP Technik in Germany. Maco Direct manages the manufacture and distribution of the Rollei films (to the best of my knowledge).
The Rollei branded films are typically coated by Agfa-Gevaert or ORWO (Filmotec) depending on the emulsion, but the Rollei RPX films are manufactured by Harman in the UK and are either Kentmere or “closely related to” Kentmere emulsions. (I’ve compared Kentmere 100 and RPX 100 and my observations suggest they are the same material)
Many of the films sold under the Rollei brand name - particularly the films discussed here under the umbrella of “near infrared” are based on the Aviphot aerial surveillance films from Agfa-Gevaert.
In this era, it’s not at all unusual to find that many films are simply a rebranding of a film made/sold by one of the few actual manufacturers. Remember, there are only a handful of companies that actually make film - Kodak, Harman (Ilford, Kentmere), Fujifilm, Foma, Adox, Lucky, Ferrania, Orwo, Agfa-Gevaert, and InovisCoat (although the current state of InovisCoat is unclear, but it appears that around 2022, InovisCoat was absorbed into Orwo and now operates as a property of Orwo).
So bear in mind when choosing from the scores of film brands that they all come from one of a small group of manufacturers who are contracted to make films under a variety of brand names. Knowing who makes a film can be useful - as someone said earlier, why buy Rollei RPX 100 when the same film can be had as Kentmere100?