For example the Argentinian teammate from doris89592's blog

To find out whether you can in FIFA 23 change concept player roles, you should study the rest of FIFA 23 Coins this guide.Furthermore, due to non-specific players not contributing to chemistry , players who would have received benefits from their league, club or even their country won't receive any boosts to their chemistry.

It can be extremely frustrating when you're trying to construct an SBC with specific chemistry requirements for example, since you don't want to purchase any player you can find only to find out it doesn't fit in with the requirements. In addition, it can be frustrating when you are testing the potential squads you could use for your team. Any kind of hybrid might cause problems when trying to incorporate certain players into.

The reason it's such a big issue to be a problem in FIFA 23 is due to the higher chemistry standards. In the past FIFA titles, each position was assigned a number of similar positions that could contribute to the chemistry. 

In other words, it was possible to get a sense of how your squad could perform with or without any modifications to the position. The centre midfielder for instance could be given seven chems in CAM and CDM however, the case with FIFA 23 this is no longer the case.

For example the Argentinian teammate who plays for River Plate will fill a provisional yellow spot for Argentina, River Plate, and also the CONMEBOL Libertadores league. This won't affect the chemistry of any of the current players on your squad However, it can give you an idea how the chemistry is likely to be FUT 23 Coins buy if the out-of position players were rectified.