How to upload images within request body in retrofit?

Server code (C#):

• Previously

public class RequestDto : DtoBase
{
    public string id { get; set; }

    public List<byte[]> Images { get; set; }

    public decimal Latitude { get; set; }

    public decimal Longitude { get; set; }
}

• Updated

public class RequestDto : DtoBase
{
    public string id { get; set; }

    public List<IFormFile> Images { get; set; }

    public decimal Latitude { get; set; }

    public decimal Longitude { get; set; }
}

• API

[HttpPost("dataTransfer")]
public async Task<ResponseDto> DataTransfer(RequestDto dto) {
}

Mobile application (Kotlin):

This was my DTO class previously:

@JsonClass(generateAdapter = true)
class RequestDto(
    val id: String,
    val images: List<ByteArray>,
    val latitude: Double,
    val longitude: Double
)

And my retrofit interface looked like this:

@POST("/{projectId}/dataSync/dataTransfer")
fun transferData(
    @Path("projectId") projectId: String,
    @Body Request: RequestDto
): Deferred<ApiResponse<ResponseDto>>

Now I need to upload a list of image files instead of List<ByteArray>. How do I go about doing that? Kindly point me in the correct direction.

Update:
This is not an issue to be resolved on the client side. Will delete the question once the bounty period ends.

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