Trying to do something like what's at the link below. but with text and other flat objects. Simple Deform bend is close but not what I'm looking for.
First, add your text, rotate it so it's "upright". Convert it to a mesh, and notice in wireframe mode that the topology looks like garbage:
Add a Decimate Modifier set to Planar to clean (most of it) up. Good enough for now. Apply the modifier.
Enter edit mode and select the whole mesh. Select the Spin Tool from the bar on the left.
Use one of the orthographic perspectives (Numpad 1 or Numpad 3) to get a perfect side view. Position your 3D Cursor directly below your text with Shift + Right Click (3D cursor acts as pivot point for Spin Tool by default).
Click and hold down your mouse and start turning the mesh. You can hold Ctrl to make it step by increment.
Inset all the front faces so you can shade smooth without artifacts.
EDIT - Sorry, I just re-read your question and saw you said 45 degrees and not 90. Here's a pic showing 45. I also added a material, a base and some ambient occlusion so it looks less like dental clay.
Here it is with the text from your example image along with a simple material consisting of a Bumped Noise Texture (to give it that bumpy, 3D-printed look), and some Subsurface Scattering to make it look a bit like plastic.
As Gordon says, you need enough topology to be able to bend your font. What you can do is create your text, convert to mesh, extrude a bit, Shift to repeat the extrusion:
Create an empty close to your object. Give your object a Simple Deform modifier on Bend mode, Angle > -90°, with the empty as Origin:
Rotate the empty on X (use the Ctrl key to rotate 5° by 5°), move it until you have the correct shape:
Right click on your object and Shade Smooth, in the Object Data panel > Normals, enable Auto Smooth:
If you move the empty you can change the rotation center: