The ALICE Collaboration recently published a plethora of results on the interaction between many exotic combinations of particles, most notably $\text{p}$-$\Omega$, obtained from femtoscopic measurements in pp collisions at the LHC. Previous studies of the source in pp collisions at $\sqrt{s}=13 \; \text{TeV}$  have been performed by analysing p-p and p-$\Lambda$ correlations. The source was constructed using a Gaussian core for the primordial particles and introducing exponential deformations due to the decay of short-lived strongly decaying resonances. The conclusion was that the primordial sources for baryons share a common transverse mass ($m_{\text{T}}$) scaling.  The topic of this seminar is to discuss recent developments and efforts  supporting the case that indeed all hadrons share a common primordial source. The main focus will lie on the femtoscopy of mesons which were shown to exhibit the same $m_{\text{T}}$ scaling, for example same charge $\pi$-$\pi$ (and $\text{K}^+$-p). These systems are especially crucial to understand the source, as by far the largest contribution from resonances is expected. A differential study of the spatial extension of the source function as a function of $m_{\text{T}}$ and multiplicity is presented. The results are  based on minimum-bias and high-multiplicity pp collisions at $\sqrt{s}=13\;\text{TeV}$ recorded with the ALICE detector. Finally, the impact of these findings is discussed in the broader context of femtoscopic measurements and coalesence models.